Description
LibreNMS is a community-based GPL-licensed network monitoring system. The alert rule name in the Alerts > Alert Rules page is not properly sanitized, and can be used to inject HTML code. This vulnerability is fixed in 25.10.0.
Affected products
librenms: librenms
References3
- github.com/librenms/librenms/security/advisories/GHSA-6g2v-66ch… ExploitVendor Advisory
- github.com/librenms/librenms/security/advisories/GHSA-6g2v-66ch… ExploitVendor Advisory
- github.com/librenms/librenms/commit/dccdf6769976a974d70f06a7ce8… Patch
Metrics
- CVSS 3.1
-
4.8
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 20 · as of 9 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.