Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

isso-comments/isso

              master @ 124a923
            

Fixes

CVEs

HIGH

Peak severity

66.7%

Coverage

Highlights

Stored XSS: 6 prior fixes. Scrutinize any change in this area.

isso/views/comments.py: most-fixed (5 issues). Treat as high-risk during review.

12 high-severity fixes in this history; regressions here are high-impact.

Recurring patterns

The bug types that recur here, drawn from past fixes, not open vulnerabilities.

Stored XSS: Multiple fixes address escaping of the website field in href attribute context and edit endpoints, indicating a recurring failure to escape single quotes properly.

Stored XSS: The HTML sanitizer was replaced multiple times (custom HTMLParser to html5lib HTMLSanitizer to bleach), showing persistent weaknesses in sanitization logic.

Auth Bypass: Edit cookie validation was insufficient, allowing replay of foreign-signed payloads. A separate fix moved session key storage from config to database to prevent predictable key reuse.