CVE-2024-49758: LibreNMS has a stored XSS in ExamplePlugin with Device's Notes

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-11-15 · updated 2026-06-17
Weakness: CWE-79

Description

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. User with Admin role can add Notes to a device, the application did not properly sanitize the user input, when the ExamplePlugin enable, if java script code is inside the device's Notes, its will be trigger. This vulnerability is fixed in 24.10.0.

Affected products

librenms: before 24.10.0 — fixed in 24.10.0

How to fix

Upgrade to a fixed version: librenms 24.10.0. Check the vendor advisory for mitigations.

References

https://github.com/librenms/librenms/commit/24b142d753898e273ec20b542a27dd6eb530c7d8
https://github.com/librenms/librenms/security/advisories/GHSA-c86q-rj37-8f85

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