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🛡️ Sentinel: [security improvement] Harden CSP and secure dynamic buttons #133

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🛡️ Sentinel: [security improvement] Harden CSP and secure dynamic buttons #133

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5 changes: 4 additions & 1 deletion index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,8 @@
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; style-src 'self' 'sha256-fgxmLOznNmVf4GAd24jy5Eiv/Rer+7sVLOBqnsVx0nY='; script-src 'self' 'sha256-cPRnZP+O4z5KsN+vdFstQwgKExGtoN98I3Gq+Tm1aSA='; object-src 'none'; base-uri 'self'; upgrade-insecure-requests;">
<!-- ✅ Sentinel: Strong CSP with form-action 'none' for defense-in-depth -->
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; style-src 'self' 'sha256-fgxmLOznNmVf4GAd24jy5Eiv/Rer+7sVLOBqnsVx0nY='; script-src 'self' 'sha256-L3nLrvOizob7JQRNCMsqwCZ+ww62L/Ob5FngrmPhReY='; form-action 'none'; object-src 'none'; base-uri 'self'; upgrade-insecure-requests;">
<meta name="referrer" content="no-referrer">
<title>5ive - UX Sample</title>
<style>
Expand Down Expand Up @@ -167,6 +168,8 @@ <h1>Welcome to 5ive</h1>
feedback.appendChild(content);

const closeBtn = document.createElement('button');
// ✅ Sentinel: Explicitly set type='button' to prevent accidental form submission
closeBtn.type = 'button';
closeBtn.className = 'close-btn';
closeBtn.setAttribute('aria-label', 'Close notification');
closeBtn.textContent = '×';
Expand Down