🛡️ Sentinel: [HIGH] Fix XSS vulnerability in Astro SSR dangerouslySetInnerHTML#12
🛡️ Sentinel: [HIGH] Fix XSS vulnerability in Astro SSR dangerouslySetInnerHTML#12
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…InnerHTML Co-authored-by: bobdivx <6737167+bobdivx@users.noreply.github.com>
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a critical security enhancement by mitigating a high-severity XSS vulnerability. It ensures that user-generated content displayed on the frontend is properly sanitized, preventing malicious script injection and safeguarding the application's integrity and user data. The solution chosen is robust, supporting both server-side and client-side rendering environments. Highlights
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Code Review
This pull request effectively addresses a high-severity Cross-Site Scripting (XSS) vulnerability by integrating isomorphic-dompurify to sanitize HTML content before it is rendered using dangerouslySetInnerHTML. The changes correctly introduce the necessary dependency and apply the sanitization logic to both direct HTML input and HTML converted from BBCode, ensuring secure rendering in Astro's SSR environment. The addition of a sentinel.md file is also a good practice for documenting security fixes.
| function sanitizePreviewHtml(html: string): string { | ||
| return html.replace(/\{\}/g, ''); | ||
| // Use isomorphic-dompurify for Astro SSR compatibility | ||
| return DOMPurify.sanitize(html.replace(/\{\}/g, '')); |
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The integration of DOMPurify.sanitize is a critical step to prevent Cross-Site Scripting (XSS) vulnerabilities. Applying it to the HTML output, whether directly provided or converted from BBCode, ensures that potentially malicious content is neutralized before being rendered. This directly addresses the vulnerability described in the pull request.
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🚨 Severity: HIGH
💡 Vulnerability: Unsanitized input from backend tracker descriptions could be injected via
dangerouslySetInnerHTML.🎯 Impact: This could result in a Cross-Site Scripting (XSS) vulnerability.
🔧 Fix: We used
isomorphic-dompurifyto securely sanitize HTML without breaking Astro's SSR hydration.✅ Verification: Ensure the app builds without errors and
DOMPurify.sanitizeproperly prevents script injection intoDescriptionPreview.tsx. Tests pass successfully.PR created automatically by Jules for task 12348185506586914973 started by @bobdivx