CVE-2026-13376
WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in spamBlocker Module
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS spamBlocker module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-1071. This issue affects Fireware OS 12.0 up to and including 12.12, 12.5 up to and including 12.5.18, and 2025.1 up to and including 2026.2.
| CWE | CWE-79 |
| Vendor | watchguard |
| Product | fireware os |
| Published | Jul 2, 2026 |
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Affected Versions
WatchGuard / Fireware OS
12.0 ≤ 12.12 12.5 ≤ 12.5.18 2025.1 ≤ 2026.2
References
Credits
Simone Paganessi (https://www.linkedin.com/in/simonepaganessi)