Security: multiarc/Heddle

Security

SECURITY.md

Security Policy

Supported versions

Security fixes are provided for the latest released 4.x line. Please make sure you can reproduce an issue against the most recent release before reporting.

VersionSupported
4.x (latest)✅
< 4.0❌

Reporting a vulnerability

Please do not report security vulnerabilities through public GitHub issues, discussions, or pull requests.

Instead, use one of the private channels:

  1. Preferred: GitHub's private vulnerability reporting — open the repository's Security tab and click "Report a vulnerability" (https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.

Please include:

  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.

What to expect

  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the advisory unless you prefer to remain anonymous.

Please act in good faith and give us reasonable time to address the issue before any public disclosure.

Scope note

Heddle compiles templates (including embedded C# expressions) into executable code. It is designed for first-party, trusted templates and does not sandbox template input. Rendering untrusted or user-supplied templates is outside the intended threat model and is not, by itself, considered a vulnerability. See the documentation for details.

There aren't any published security advisories

, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories


, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories


, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories


, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories


, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories


, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories


, '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
Security: multiarc/Heddle
Security

SECURITY.md

Security Policy
Supported versions
Security fixes are provided for the latest released 4.x line. Please make sure you can
reproduce an issue against the most recent release before reporting.
VersionSupported
4.x (latest)✅
< 4.0❌
Reporting a vulnerability
Please do not report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Instead, use one of the private channels:
  1. Preferred: GitHub's private vulnerability reporting — open the repository's
Security tab and click "Report a vulnerability"
(https://github.com/multiarc/Heddle/security/advisories/new).
  2. Email:multiarc@gmail.com with the subject line Heddle security report.
Please include:
  • a description of the vulnerability and its impact,
  • the affected version(s) and platform/runtime,
  • steps to reproduce or a proof-of-concept,
  • any suggested mitigation, if known.
What to expect
  • Acknowledgement of your report within 5 business days.
  • An assessment and, where confirmed, a plan and timeline for a fix.
  • Coordinated disclosure: we will agree on a disclosure date with you and credit you in the
advisory unless you prefer to remain anonymous.
Please act in good faith and give us reasonable time to address the issue before any public
disclosure.
Scope note
Heddle compiles templates (including embedded C# expressions) into executable code. It is
designed for first-party, trusted templates and does not sandbox template input.
Rendering untrusted or user-supplied templates is outside the intended threat model and is
not, by itself, considered a vulnerability. See the documentation for details.
 There aren't any published security advisories