Vulnerability · Published Sep 15, 2025 · Assigned by WatchGuard

CVE-2025-6947WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in SIP Proxy Configuration

Medium 4.8

In plain English

A medium-severity cross-site scripting in Fireware OS from WatchGuard. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 4.0)4.8Medium

Exploit odds (30 days)0.5%top 58.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
WatchGuard	Fireware OS	12.0 – before 12.11.3
WatchGuard	Fireware OS	12.0 – before 12.5.13

Weakness: CWE-79 · 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

References

https://psirt.watchguard.com/CVE-2025-6947 vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00012 vendor-advisory