CVE-2025-1239 WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Blocked Sites List
An authenticated administrator can inject malicious scripts into the Blocked Sites list, executing arbitrary JavaScript 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-2025-1239?
CVE-2025-1239 is a medium-severity cross-site scripting vulnerability in WatchGuard Fireware OS, published on 14 Feb 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 Blocked Sites list. 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-2025-1239?
How do I fix CVE-2025-1239?
No fix has been published for CVE-2025-1239 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-2025-1239 being exploited?
There is no known exploitation of CVE-2025-1239 in the wild and no public exploit code.
Sources
Also known as GHSA-7f92-pjcc-3q4m.