CVE-2025-6947 WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in SIP Proxy Configuration
An authenticated administrator can inject malicious scripts into the SIP Proxy configuration, allowing execution in other users' management interfaces.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-6947?
CVE-2025-6947 is a medium-severity cross-site scripting vulnerability in WatchGuard Fireware OS, published on 15 Sep 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-6947?
How do I fix CVE-2025-6947?
No fix has been published for CVE-2025-6947 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-6947 being exploited?
There is no known exploitation of CVE-2025-6947 in the wild and no public exploit code.
Sources
Also known as GHSA-gwm6-fv92-g69q.