Vulnerabilities CVE-2026-13376

CVE-2026-13376

Medium

Open

TLP:CLEAR

WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in spamBlocker Module

NVD CVE.org

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Description

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.

Details

CVSS Score: 4.8
EPSS Score ⓘ: 0.17%

6.6th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Confidence: 90%
Published: Jul 2, 2026
Last Modified: Aug 10, 2026

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