A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. 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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-15548 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS. This vulnerability requires an authenticated administrator session to a locally managed Firebox. This issue affects Fireware OS: from 12.0 through 12.11.1.
Fixes

Solution

Fireware OS 12.11.2


Workaround

No workaround given by the vendor.

History

Sat, 08 Aug 2026 03:00:00 +0000

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. This vulnerability requires an authenticated administrator session to a locally managed Firebox. This issue affects Fireware OS: from 12.0 through 12.11.1. A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. 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

Sat, 17 May 2025 03:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 16 May 2025 20:30:00 +0000

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. This vulnerability requires an authenticated administrator session to a locally managed Firebox. This issue affects Fireware OS: from 12.0 through 12.11.1.
Title WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Acces Portal Configuration
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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-08T02:27:29.992Z

Reserved: 2025-05-16T00:31:33.445Z

Link: CVE-2025-4805

cve-icon Vulnrichment

Updated: 2025-05-17T02:27:27.856Z

cve-icon NVD

Status : Deferred

Published: 2025-05-16T21:15:35.470

Modified: 2026-06-17T09:34:03.020

Link: CVE-2025-4805

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses