# CVE-2025-13939

## Summary

- **CVE ID:** CVE-2025-13939
- **Severity:** MEDIUM
- **CVSS Score:** 4.8 (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)
- **CWE:** CWE-79, CWE-79
- **Published:** Dec 4, 2025
- **Last Modified:** Aug 10, 2026

## Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (Gateway Wireless Controller module) allows Stored XSS.This issue affects Fireware OS 11.7.2 up to and including 11.12.4+541730, 12.0 up to and including 12.11.4, 12.5 up to and including 12.5.13, and 2025.1 up to and including 2025.1.2.

## Affected Products

- WatchGuard — Fireware OS (11.7.2)
- WatchGuard — Fireware OS (12.0)
- WatchGuard — Fireware OS (12.5)
- WatchGuard — Fireware OS (2025.1)

## References

- [CNA](https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00024)
- [CNA](https://psirt.watchguard.com/CVE-2025-13939)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 9.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._