CVE-2025-1239

WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Blocked Sites List

Published Feb 14, 2025 CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Description
A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Blocked Sites list. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.

Remediation

Vendor Solution

Fireware OS 12.11.1, Fireware OS 12.5.13

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-2095 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the Blocked Sites list. This vulnerability requires an authenticated administrator session to a locally managed Firebox.This issue affects Fireware OS: from 12.0 through 12.5.12+701324, from 12.6 through 12.11.
History
Type Values Removed Values Added
Description Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the Blocked Sites list. This vulnerability requires an authenticated administrator session to a locally managed Firebox.This issue affects Fireware OS: from 12.0 through 12.5.12+701324, from 12.6 through 12.11. A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Blocked Sites list. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.
First Time appeared Watchguard
Watchguard fireware Os
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Type Values Removed Values Added
Metrics epss

{'score': 0.00089}

epss

{'score': 0.00099}

Type Values Removed Values Added
Metrics epss

{'score': 0.00082}

epss

{'score': 0.00089}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the Blocked Sites list. This vulnerability requires an authenticated administrator session to a locally managed Firebox.This issue affects Fireware OS: from 12.0 through 12.5.12+701324, from 12.6 through 12.11.
Title WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Blocked Sites List
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 4.8, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WatchGuard
Published
Updated
Aug 8, 2026, 2:16 AM
Reserved
Feb 11, 2025, 7:40 PM
Status
Deferred
Published
Feb 14, 2025, 2:15 PM
Modified
Aug 8, 2026, 3:16 AM