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.
References (2)
Core 2
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/librenms/librenms/security/advisories/GHSA-c89f-8g7g-59wj
Scores
CVSS v3
4.3
EPSS
0.0000
EPSS Percentile
0.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (2)
librenms/librenms
< 25.12.0
librenms/librenms
0 - 25.12.0Packagist
Published
Dec 23, 2025
Tracked Since
Feb 18, 2026