CVE-2025-1239

WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Blocked Sites List

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the Blocked Sites list. This vulnerability requires an authenticated administrator session to a locally managed Firebox.This issue affects Fireware OS: from 12.0 through 12.5.12+701324, from 12.6 through 12.11.

Category

4.8
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.06%
Affected: WatchGuard Fireware OS
Published at:
Updated at:

References

Link Tags
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00002

Frequently Asked Questions

What is the severity of CVE-2025-1239?
CVE-2025-1239 has been scored as a medium severity vulnerability.
How to fix CVE-2025-1239?
To fix CVE-2025-1239, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-1239 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-1239 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-1239?
CVE-2025-1239 affects WatchGuard Fireware OS.
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