diff --git a/backend/app/middleware/security.py b/backend/app/middleware/security.py index 6b9d42e..b58d2f6 100644 --- a/backend/app/middleware/security.py +++ b/backend/app/middleware/security.py @@ -52,14 +52,37 @@ class SecurityHeadersMiddleware(BaseHTTPMiddleware): # Content Security Policy (CSP) # Restricts sources of content that can be loaded - # TODO: Remove 'unsafe-inline' and 'unsafe-eval' and use nonces/hashes instead + # + # SECURITY TODO: Current CSP includes 'unsafe-inline' and 'unsafe-eval' which + # weaken XSS protection. To remove these: + # + # For script-src 'unsafe-inline': + # 1. Move all inline ' + +// Image onerror +'' + +// SVG onload +'' + +// Event handler injection +'">' + +// JavaScript protocol +'javascript:alert("XSS")' + +// HTML entity encoding bypass +'<script>alert("XSS")</script>' +``` + +With the fixes applied: +- `textContent` automatically escapes these payloads +- They would display as literal text, not execute +- No HTML parsing occurs for user data + +## Existing Test Coverage + +The test suite already includes XSS input validation: + +**File**: `backend/app/tests/test_security.py` + +```python +# Line 146: Domain config validation +malicious_config = {"name": "example.com", "description": ""} +result = validate_domain_config(malicious_config) +assert not result["valid"] +assert "description" in result["errors"] +``` + +**Status**: ✅ Test validates that malicious input is rejected at API level + +## Security Scanning Results + +### CodeQL Analysis +``` +Analysis Result for 'python, javascript'. Found 0 alerts: +- **python**: No alerts found. +- **javascript**: No alerts found. +``` + +**Status**: ✅ No vulnerabilities detected + +### Code Review Tool +``` +Code review completed. Reviewed 5 file(s). +No review comments found. +``` + +**Status**: ✅ No issues found + +## Remaining Work + +### CSP Hardening (Future Work) +The Content Security Policy still includes `unsafe-inline` and `unsafe-eval` directives. To remove these: + +1. **For script-src 'unsafe-inline'**: + - Move inline `