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WatchGuard Fireware OS Web UI Reflected Cross-Site Scripting Vulnerability

Vulnerability

A reflected cross-site scripting vulnerability has been identified in the Fireware OS Web UI. This vulnerability allows the execution of malicious JavaScript in the browser of an authenticated management user who clicks on a specially crafted link. It affects Fireware OS versions 12.7 prior to 12.11.7 and 2025.1 prior to 2026.1.1.

Impact

Exploitation of this vulnerability allows for reflected cross-site scripting, where an attacker can execute malicious scripts in the context of the user's browser.

Added: Mar 3, 2026, 2:18 PM
Updated: Mar 3, 2026, 10:45 PM

Vulnerability Rating

Custom Algorithm
spread
4.5
impact
1.7
exploitability
5.8
remediation
0.0
relevance
3.4
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.