CVE-2026-13377

MediumCVSS 4.8/10Last modified Oct 25, 2026

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS SIP Proxy module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-6947.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

VendorProductVersions
WatchGuardFireware OS>= 12.0, < 12.11.9
WatchGuardFireware OS>= 2025.1, < 2026.2.1; >= 12.0, < 12.12.1
WatchGuardFireware OS>= 12.0, < 12.5.19

References

Timeline

Published
Jul 3, 2026
Last modified
Oct 25, 2026
NVD status
Modified

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