CVE-2025-55296: Librenms

Medium severity, CVSS 5.4. EPSS: 12.8% chance of exploitation in the next 30 days.

librenms is a community-based GPL-licensed network monitoring system. A stored Cross-Site Scripting (XSS) vulnerability exists in LibreNMS (<= 25.6.0) in the Alert Template creation feature. This allows a user with the admin role to inject malicious JavaScript, which will be executed when the template is rendered, potentially compromising other admin accounts. This vulnerability is fixed in 25.8.0.

Affected products

• Librenms Librenms: before 25.8.0 (fixed in 25.8.0)

Published 2025-08-18. Last modified 2026-06-17.