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.
CWE-79, CWE-116, CWE-434