CVE-2024-47528: LibreNMS Contains a Stored XSS via File Upload

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: 2024-10-01 · updated 2026-06-17
Weakness: CWE-79

Description

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. Stored Cross-Site Scripting (XSS) can be achieved by uploading a new Background for a Custom Map. Users with "admin" role can set background for a custom map, this allow the upload of SVG file that can contain XSS payload which will trigger on load. This led to Stored Cross-Site Scripting (XSS). The vulnerability is fixed in 24.9.0.

Affected products

librenms: before 24.9.0 — fixed in 24.9.0

How to fix

Upgrade to a fixed version: librenms 24.9.0. Check the vendor advisory for mitigations.

References

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