CVE-2025-4804

Medium

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the spamBlocker module. This vulnerability requires an authenticated administrator session to a locally managed Firebox.

SeverityMedium

CVSS4.8

Exploit probability—

ProductFireware OS

PublishedMay 16, 2025

First seenMay 16, 2025

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

WatchGuard Fireware OS12.11.2, 12.5.13 or later

Vendor advisories

psirt.watchguard.com/CVE-2025-4804
watchguard.com/wgrd-psirt/advisory/wgsa-2025-00006

Affected products

Product	Affected versions	Fixed in
WatchGuard Fireware OS	12.0 ≤ v < 12.11.2, 12.5 ≤ v < 12.5.13	12.11.2, 12.5.13

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