Security context

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

mozilla/kitsune

              main @ a3efb48
            

Fixes

CVEs

CRITICAL

Peak severity

45.2%

Coverage

Highlights

Auth Bypass: 30 prior fixes. Scrutinize any change in this area.

kitsune/users/auth.py: most-fixed (5 issues). Treat as high-risk during review.

48 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.

Auth Bypass: The largest risk class; fixes repeatedly add missing permission checks, ownership checks, and group-based authorization. Inconsistent enforcement across views, APIs, and templates creates bypass opportunities.

Cross-Site Scripting (XSS): Recurring XSS from unsafe HTML sanitization (bleach bypass), unescaped filenames in attributes/DOM, and unescaped interpolation. Both server-side and client-side fixes needed.

Insecure Deserialization: Pickle serialization in Celery tasks allowed RCE via crafted payloads. Fixed by passing primitive IDs instead of model instances. Must never reintroduce pickle.