Highlights
Restricted File Upload Bypass: 4 prior fixes. Scrutinize any change in this area.
modules/user/src/Controller/UserController.php: most-fixed (3 issues). Treat as high-risk during review.
23 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.
Authentication Bypass: 2 historical fix(es) link lib/Drupal/Core/Session/SessionHandler.php to Authentication Bypass.
Open Redirect: 2 historical fix(es) link lib/Drupal/Component/Utility/UrlHelper.php to Open Redirect.
Authentication Bypass: 1 historical fix(es) link modules/user/src/Controller/UserController.php to Authentication Bypass.