cbcvebase.
CVE-2025-13939
published 2025-12-04

CVE-2025-13939: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (Gateway Wireless…

PriorityP428medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.15%
4.6th percentile
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

7 ranges
VendorProductVersion rangeFixed in
watchguardfireware>= 11.7.2 < 12.11.512.11.5
watchguardfireware>= 11.7.2 < 12.5.1412.5.14
watchguardfireware>= 2025.1 < 2025.1.32025.1.3
watchguardfireware_os11.7.2 – 11.12.4+541730
watchguardfireware_os12.0 – 12.11.4
watchguardfireware_os12.5 – 12.5.13
watchguardfireware_os2025.1 – 2025.1.2

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv4.04.8MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.