Firebox and Fireware OS
CVE-2025-4804: WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Hotpot Configuration
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the spamBlocker module.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Fireware OS (Default) 12.0 | 12.11.2 or later |
| Fireware OS (T15/T35) 12.5 | 12.5.13 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the spamBlocker module. This vulnerability requires an authenticated administrator session to a locally managed Firebox.
Exploitation
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.