Security context

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

ezyang/htmlpurifier

              master @ 7641f75
            

Fixes

CVEs

HIGH

Peak severity

0.0%

Coverage

Highlights

Clickjacking / Tabnabbing: 1 prior fix. Scrutinize any change in this area.

HTMLPurifier/AttrTransform/TargetNoreferrer.php: most-fixed (1 issue). Treat as high-risk during review.

1 high-severity fix in this history; regressions here are high-impact.

Recurring patterns

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

XSS: Improper CDATA handling allowed script injection; fixed with /s modifier and new escapeCommentedCDATA.

Reflected XSS: Unescaped element/attribute names in error messages could reflect attacker input.

Open Redirect: Missing rel=noreferrer on target links enabled reverse tabnabbing.