[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Jovinull wants to merge 1 commit into
base:develop
Choose a base branch
from
Open

[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva #245

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions README.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down
17 changes: 17 additions & 0 deletions SECURITY.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.
13 changes: 12 additions & 1 deletion backend/src/middleware/securityHeaders.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
"default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
"default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
res: Response,
next: NextFunction,
): void {
const contentSecurityPolicy = req.path.startsWith("/docs")
? swaggerContentSecurityPolicy
: apiContentSecurityPolicy;

res.setHeader("Content-Security-Policy", contentSecurityPolicy);
res.setHeader("X-Content-Type-Options", "nosniff");
res.setHeader("X-Frame-Options", "DENY");
res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down
40 changes: 40 additions & 0 deletions backend/tests/unit/middleware/securityHeaders.test.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
apiContentSecurityPolicy,
securityHeaders,
swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
it("aplica uma CSP restritiva e os demais headers de proteção", () => {
const setHeader = vi.fn();
const next = vi.fn();

securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

expect(setHeader).toHaveBeenCalledWith(
"Content-Security-Policy",
apiContentSecurityPolicy,
);
expect(apiContentSecurityPolicy).toContain("default-src 'none'");
expect(apiContentSecurityPolicy).toContain("object-src 'none'");
expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
expect(next).toHaveBeenCalledOnce();
});

it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
const setHeader = vi.fn();
const next = vi.fn();

securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

expect(setHeader).toHaveBeenCalledWith(
"Content-Security-Policy",
swaggerContentSecurityPolicy,
);
expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
});
});
7 changes: 6 additions & 1 deletion front_admin/nginx.conf
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
root /usr/share/nginx/html;
index index.html;

add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "DENY" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;

location / {
try_files $uri $uri/ /index.html;
}
}
}
30 changes: 1 addition & 29 deletions frontend/index.html
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
<link rel="icon" type="image/png" href="public/icone.png" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />

<script>
(function () {
const root = document.documentElement;


const storedPreference =
localStorage.getItem("jobs-theme-preference") ||
localStorage.getItem("theme") ||
localStorage.getItem("vite-ui-theme");

const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
? storedPreference
: "system";

const resolvedTheme = themePreference === "system"
? (prefersDark ? "dark" : "light")
: themePreference;

if (resolvedTheme === "dark") {
root.classList.add("dark");
} else {
root.classList.remove("dark");
}

root.setAttribute("data-theme", resolvedTheme);
})();
</script>
<script type="module" src="/src/theme-bootstrap.ts"></script>

<title><Cand!Date!></title>
</head>
Expand Down
7 changes: 6 additions & 1 deletion frontend/nginx.conf
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
root /usr/share/nginx/html;
index index.html;

add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "DENY" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;

location / {
try_files $uri $uri/ /index.html;
}
}
}
21 changes: 21 additions & 0 deletions frontend/src/theme-bootstrap.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
localStorage.getItem("jobs-theme-preference") ??
localStorage.getItem("theme") ??
localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
storedPreference === "light" ||
storedPreference === "dark" ||
storedPreference === "system"
? storedPreference
: "system";
const resolvedTheme =
themePreference === "system"
? prefersDark
? "dark"
: "light"
: themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);
16 changes: 16 additions & 0 deletions frontend/tests/unit/new_dashboard/jobs.test.tsx
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
});

it("não propaga atributos ativos nem protocolos não permitidos", () => {
const { container } = render(
<FormattedJobDescription
description={[
'<a href="data:text/html,blocked">Link de dados</a>',
'<p onclick="alert(1)">Texto seguro</p>',
'<iframe src="https://example.com"></iframe>',
].join("")}
/>,
);

expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
expect(container.querySelector("iframe")).not.toBeInTheDocument();
});

it("valida e salva uma vaga manual nova", () => {
const onAddJob = vi.fn();
const onClose = vi.fn();
Expand Down
14 changes: 14 additions & 0 deletions frontend/vercel.json
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
"headers": [
{
"source": "/(.*)",
"headers": [
{
"key": "Content-Security-Policy",
"value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
},
{ "key": "X-Content-Type-Options", "value": "nosniff" },
{ "key": "X-Frame-Options", "value": "DENY" },
{ "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
]
}
],
"rewrites": [
{
"source": "/api/(.*)",
Expand Down
14 changes: 14 additions & 0 deletions vercel.json
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
"headers": [
{
"source": "/(.*)",
"headers": [
{
"key": "Content-Security-Policy",
"value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
},
{ "key": "X-Content-Type-Options", "value": "nosniff" },
{ "key": "X-Frame-Options", "value": "DENY" },
{ "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
]
}
],
"rewrites": [
{
"source": "/api/(.*)",
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva#245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

Jovinull
wants to merge
1
commit into

base:develop
Choose a base branch

from

 Open


[PAV-132] Mitigar DOM XSS e aplicar CSP restritiva
#245
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


1 change: 1 addition & 0 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -14,6 +14,7 @@
[TESTING](TESTING.md) |
[CONTRIBUTING](contribuition.md) |
[ESCOPO](ESCOPO.md) |
[SECURITY](SECURITY.md) |
[Frontend](frontend/README.md) |
[Frontend Architecture](frontend/ARCHITECTURE.md) |
[Front Admin](front_admin/README.md)
Expand Down

17 changes: 17 additions & 0 deletions
SECURITY.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
# Segurança

## Content Security Policy

Os frontends publicados por Nginx e Vercel enviam uma Content Security Policy (CSP) restritiva. A política bloqueia plugins, enquadramento por outros sites, scripts externos e execução de scripts inline. Estilos inline permanecem permitidos porque componentes React aplicam estilos dinâmicos; isso não autoriza JavaScript inline.

As origens permitidas são mantidas explicitamente nos arquivos `frontend/nginx.conf`, `front_admin/nginx.conf`, `vercel.json` e `frontend/vercel.json`. Antes de incluir uma nova origem, confirme que ela é necessária e restrinja-a à diretiva correta (`connect-src`, `img-src`, `font-src` ou `style-src`). Não use curingas nem adicione `'unsafe-inline'` a `script-src`.

A API responde com uma CSP ainda mais restritiva, apropriada para respostas JSON: não permite carregar recursos, executar scripts, enviar formulários ou ser incorporada em frames.

## Conteúdo externo

Descrições de vagas são convertidas em elementos React a partir de uma allowlist. Não use `dangerouslySetInnerHTML` para renderizar dados de vagas, perfis ou integrações externas. Links externos devem aceitar somente URLs `http` e `https`; protocolos executáveis e atributos de evento não devem ser propagados para o DOM.

## Sessão

Cookies de sessão são `HttpOnly` e usam `Secure` em produção, com `SameSite` definido. A CSP reduz o impacto de uma regressão de XSS, mas não substitui a validação e a renderização segura de dados.

13 changes: 12 additions & 1 deletion
backend/src/middleware/securityHeaders.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,10 +1,21 @@
import { NextFunction, Request, Response } from "express";

export const apiContentSecurityPolicy =
 "default-src 'none'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'";

export const swaggerContentSecurityPolicy =
 "default-src 'self'; base-uri 'none'; object-src 'none'; form-action 'none'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline'";

export function securityHeaders(
_req: Request,
req: Request,
 res: Response,
 next: NextFunction,
): void {
 const contentSecurityPolicy = req.path.startsWith("/docs")
 ? swaggerContentSecurityPolicy
 : apiContentSecurityPolicy;

 res.setHeader("Content-Security-Policy", contentSecurityPolicy);
 res.setHeader("X-Content-Type-Options", "nosniff");
 res.setHeader("X-Frame-Options", "DENY");
 res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
Expand Down

40 changes: 40 additions & 0 deletions
backend/tests/unit/middleware/securityHeaders.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,40 @@
import { describe, expect, it, vi } from "vitest";
import {
 apiContentSecurityPolicy,
 securityHeaders,
 swaggerContentSecurityPolicy,
} from "../../../src/middleware/securityHeaders";

describe("securityHeaders", () => {
 it("aplica uma CSP restritiva e os demais headers de proteção", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/health" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 apiContentSecurityPolicy,
 );
 expect(apiContentSecurityPolicy).toContain("default-src 'none'");
 expect(apiContentSecurityPolicy).toContain("object-src 'none'");
 expect(apiContentSecurityPolicy).toContain("frame-ancestors 'none'");
 expect(setHeader).toHaveBeenCalledWith("X-Content-Type-Options", "nosniff");
 expect(setHeader).toHaveBeenCalledWith("X-Frame-Options", "DENY");
 expect(next).toHaveBeenCalledOnce();
 });

 it("mantem o Swagger funcional com uma CSP limitada a documentacao", () => {
 const setHeader = vi.fn();
 const next = vi.fn();

 securityHeaders({ path: "/docs" } as any, { setHeader } as any, next);

 expect(setHeader).toHaveBeenCalledWith(
 "Content-Security-Policy",
 swaggerContentSecurityPolicy,
 );
 expect(swaggerContentSecurityPolicy).toContain("default-src 'self'");
 expect(swaggerContentSecurityPolicy).toContain("script-src 'self' 'unsafe-inline'");
 });
});

7 changes: 6 additions & 1 deletion
front_admin/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data:; img-src 'self' data: https:; connect-src 'self' https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

30 changes: 1 addition & 29 deletions
frontend/index.html

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,35 +5,7 @@
 <link rel="icon" type="image/png" href="public/icone.png" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />

 <script>
 (function () {
 const root = document.documentElement;


 const storedPreference =
 localStorage.getItem("jobs-theme-preference") ||
 localStorage.getItem("theme") ||
 localStorage.getItem("vite-ui-theme");

 const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;

 const themePreference = storedPreference === "light" || storedPreference === "dark" || storedPreference === "system"
 ? storedPreference
 : "system";

 const resolvedTheme = themePreference === "system"
 ? (prefersDark ? "dark" : "light")
 : themePreference;

 if (resolvedTheme === "dark") {
 root.classList.add("dark");
 } else {
 root.classList.remove("dark");
 }

 root.setAttribute("data-theme", resolvedTheme);
 })();
 </script>
 <script type="module" src="/src/theme-bootstrap.ts"></script>

 <title><Cand!Date!></title>
 </head>
Expand Down

7 changes: 6 additions & 1 deletion
frontend/nginx.conf

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -4,7 +4,12 @@ server {
 root /usr/share/nginx/html;
 index index.html;

 add_header Content-Security-Policy "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net" always;
 add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "DENY" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;

 location / {
 try_files $uri $uri/ /index.html;
 }
}
}

21 changes: 21 additions & 0 deletions
frontend/src/theme-bootstrap.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
const root = document.documentElement;
const storedPreference =
 localStorage.getItem("jobs-theme-preference") ??
 localStorage.getItem("theme") ??
 localStorage.getItem("vite-ui-theme");
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const themePreference =
 storedPreference === "light" ||
 storedPreference === "dark" ||
 storedPreference === "system"
 ? storedPreference
 : "system";
const resolvedTheme =
 themePreference === "system"
 ? prefersDark
 ? "dark"
 : "light"
 : themePreference;

root.classList.toggle("dark", resolvedTheme === "dark");
root.setAttribute("data-theme", resolvedTheme);

16 changes: 16 additions & 0 deletions
frontend/tests/unit/new_dashboard/jobs.test.tsx

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -510,6 +510,22 @@ describe("new_dashboard job components", () => {
 expect(screen.getByText("Conteúdo preservado")).toBeInTheDocument();
 });

 it("não propaga atributos ativos nem protocolos não permitidos", () => {
 const { container } = render(
 <FormattedJobDescription
 description={[
 '<a href="data:text/html,blocked">Link de dados</a>',
 '<p onclick="alert(1)">Texto seguro</p>',
 '<iframe src="https://example.com"></iframe>',
 ].join("")}
 />,
 );

 expect(screen.getByText("Link de dados").tagName).toBe("SPAN");
 expect(screen.getByText("Texto seguro")).not.toHaveAttribute("onclick");
 expect(container.querySelector("iframe")).not.toBeInTheDocument();
 });

 it("valida e salva uma vaga manual nova", () => {
 const onAddJob = vi.fn();
 const onClose = vi.fn();
Expand Down

14 changes: 14 additions & 0 deletions
frontend/vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down

14 changes: 14 additions & 0 deletions
vercel.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
{
 "headers": [
 {
 "source": "/(.*)",
 "headers": [
 {
 "key": "Content-Security-Policy",
 "value": "default-src 'self'; base-uri 'none'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://api.github.com https://api.candidate.app.br https://jobsglobalscraper.ddns.net"
 },
 { "key": "X-Content-Type-Options", "value": "nosniff" },
 { "key": "X-Frame-Options", "value": "DENY" },
 { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" }
 ]
 }
 ],
 "rewrites": [
 {
 "source": "/api/(.*)",
Expand Down
Loading