Cross-site scripting in LibreNMS - #VU134531

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU134531

Cross-site scripting in LibreNMS - #VU134531

Published: June 15, 2026


Vulnerability identifier: #VU134531
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: LibreNMS Project
Affected software:
LibreNMS

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary JavaScript in a victim's browser session.

The vulnerability exists due to cross-site scripting in legacy PHP templates under includes/html/ when rendering SNMP-sourced and syslog-sourced data. A remote attacker can supply crafted device metadata or syslog fields to execute arbitrary JavaScript in a victim's browser session.

User interaction is required to view an affected page, and the attacker must control a monitored SNMP device or a syslog source.


Remediation

Install security update from vendor's website.

Sources