Medium severity · published Sep 15, 2025
CVE-2025-6947
WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in SIP Proxy Configuration
4.8
CVSS
0.5%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
12.0 before 12.11.3; 12.0 before 12.5.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6947
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6947
psirt.watchguard.com
https://psirt.watchguard.com/CVE-2025-6947
www.watchguard.com
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00012
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