CVE-2025-4804

4.8 mediumEPSS 0.5%

Medium (4.8). EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

4.8 medium

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2025-05-16
Modified: 2026-08-08
Record from: the NVD, synced 2026-10-19

References

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

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