Cross-site scripting in LibreNMS - CVE-2025-55296
Published: April 24, 2026
Vulnerability identifier: #VU127441
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-55296
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: LibreNMS Project
Affected software:
LibreNMS
LibreNMS
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in another administrator's browser.
The vulnerability exists due to cross-site scripting in the Alert Template name field when creating and rendering alert templates. A remote privileged user can submit a crafted template name to execute arbitrary JavaScript in another administrator's browser.
Only administrator accounts that access the Alert Templates page are affected.
How to mitigate CVE-2025-55296
Install security update from vendor's website.