Description
A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the SIP Proxy 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.
Published: 2025-09-15
Score: 4.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Fireware OS 12.11.3, Fireware OS 12.5.13

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-29269 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the SIP Proxy module. This vulnerability requires an authenticated administrator session to a locally managed Firebox. This issue affects Firebox: from 12.0 through 12.11.2.
History

Fri, 07 Aug 2026 23:45:00 +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 via the SIP Proxy module. This vulnerability requires an authenticated administrator session to a locally managed Firebox. This issue affects Firebox: from 12.0 through 12.11.2. A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the SIP Proxy 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 fireware Os
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard fireware Os
References

Wed, 17 Sep 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Watchguard
Watchguard firebox
Watchguard fireware
Vendors & Products Watchguard
Watchguard firebox
Watchguard fireware

Tue, 16 Sep 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Mon, 15 Sep 2025 21:30:00 +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 via the SIP Proxy module. This vulnerability requires an authenticated administrator session to a locally managed Firebox. This issue affects Firebox: from 12.0 through 12.11.2.
Title WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in SIP Proxy 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'}


Subscriptions

Watchguard Firebox Fireware Fireware Os
cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-07T23:36:08.275Z

Reserved: 2025-07-01T02:34:13.150Z

Link: CVE-2025-6947

cve-icon Vulnrichment

Updated: 2025-09-16T13:50:48.271Z

cve-icon NVD

Status : Deferred

Published: 2025-09-15T22:15:34.600

Modified: 2026-06-17T10:02:55.433

Link: CVE-2025-6947

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-17T10:52:25Z

Weaknesses