Vanilla Forums 2.6.3 - Persistent Cross-Site Scripting

Vanilla Forums 2.6.3 - Persistent Cross-Site Scripting

Published 6 Sep 2026Updated 6 Sep 20264 sources
CVSS 5.4 ✓ VERIFIED REFERENCE

What happened

Stored XSS in PHP VanillaForum 2.6.3 via branding settings endpoint allows script injection.

Affected versions

Unknown product: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references