CVE-2025-68614: LibreNMS Alert Rule API Cross-Site Scripting Vulnerability

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-12-23 · updated 2026-10-19
Weakness: CWE-79

Description

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Prior to version 25.12.0, the Alert Rule API is vulnerable to stored cross-site scripting. Alert rules can be created or updated via LibreNMS API. The alert rule name is not properly sanitized, and can be used to inject HTML code. This issue has been patched in version 25.12.0.

Affected products

librenms: before 25.12.0 — fixed in 25.12.0

How to fix

Upgrade to a fixed version: librenms 25.12.0. Check the vendor advisory for mitigations.

References

https://github.com/librenms/librenms/commit/ebe6c79bf4ce0afeb575c1285afe3934e44001f1
https://github.com/librenms/librenms/security/advisories/GHSA-c89f-8g7g-59wj

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