Vigie VulnEuropean-hosted Vulnerability DB

CVE-2026-13376

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

At a glance

Severity
MEDIUM 4.8
EPSS
EPSS 0.27 % · percentile 19 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
WatchGuard
NVD status
Modified

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.

Scores

VersionScoreVectorScored by
CVSS 4.0MEDIUM 4.8CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:NWatchGuard
CVSS 4.0MEDIUM 4.8CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD · 5d1c2695-1a31-4499-88ae-e847036fd7e3 (Secondary)
CVSS 3.1MEDIUM 4.8CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:NNVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

Affected configurations (NVD CPE)

Affected products

ProductVersions
WatchGuard · Fireware OSaffected 2025.1 < 2026.2.1 ; affected 12.0 < 12.12.1
WatchGuard · Fireware OSaffected 12.0 < 12.11.9
WatchGuard · Fireware OSaffected 12.0 < 12.5.19

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD