🛡️ Sentinel: [HIGH] Fix XSS vulnerability in email preview

[brycejohnson1417]

🚨 Severity: HIGH
💡 Vulnerability: Used dangerouslySetInnerHTML for rendering email previews.
🎯 Impact: Potential Cross-Site Scripting (XSS) if DOMPurify fails to catch a bypass, leading to unauthorized actions.
🔧 Fix: Replaced dangerouslySetInnerHTML with a sandboxed iframe using srcDoc for defense-in-depth isolation. Added inline styles to preserve appearance.
✅ Verification: Ran lint, typecheck, tenant isolation checks, and verified the UI via Playwright browser tests.

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PR created automatically by Jules for task 16880957663581033798 started by @brycejohnson1417

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Project	Deployment	Actions	Updated (UTC)
map-app-supabase	Ready	Preview, Comment	Jul 2, 2026 10:27am