A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox and XTM appliances. An unauthenticated remote attacker can potentially execute arbitrary JavaScript code in the Firebox management interface by sending carefully crafted requests to exposed management ports.
Affected
Fireware OS before 12.8.1, 12.x before 12.1.4, and 12.2.x through 12.5.x before 12.5.10.