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CVE-2026-13377

MEDIUM
4.8
CVSS 4.0
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. 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.

Metadata

CVE ID
CVE-2026-13377
State
PUBLISHED
Assigner
WatchGuard
Reserved
2026-06-25 20:34 UTC
Published
2026-07-02 23:05 UTC
Last updated
2026-07-02 23:05 UTC
Primary CWE
CWE-79
CWE-79 Improper Neutralization of Input During Web Page Gene…
Vendor / Product
WatchGuard / Fireware OS
Sources
cve.org  ·  NVD

Severity & Metrics

4.8 MEDIUM CVSS 4.0
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
Affected products (1)
VendorProductPlatformVersions
WatchGuard Fireware OS — 12.0 ≤ 12.12, 12.5 ≤ 12.5.18, 2025.1 ≤ 2026.2
Weakness (CWE)
CWESourceDescription
CWE-79 cna CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
CVSS scores (1)
ScoreSeverityVersionSourceVector
4.8 MEDIUM 4.0 cna 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
References (1)
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