CVE-2025-4805: WatchGuard Fireware OS

Medium severity, CVSS 4.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.

Affected products

• WatchGuard Fireware OS: from 12.0, before 12.11.2 (fixed in 12.11.2)

Published 2025-05-16. Last modified 2026-08-08.