SB2026042416 - Cross-site scripting in LibreNMS

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2025-47931)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

The vulnerability allows a remote user to execute arbitrary script in a victim's browser.

The vulnerability exists due to cross-site scripting in the poller group name parameter of the /poller/groups form when handling user-supplied poller group names. A remote user can create a poller group with a crafted group name to execute arbitrary script in a victim's browser.

The distributed poller feature must be enabled, and user interaction is required when another user visits the add host page.

Remediation

Install update from vendor's website.

References

• https://github.com/librenms/librenms/security/advisories/GHSA-hxw5-9cc5-cmw5
• https://github.com/advisories/GHSA-hxw5-9cc5-cmw5