XSS in Librenms

CVE-2025-55296

librenms is a community-based GPL-licensed network monitoring system. A stored Cross-Site Scripting (XSS) vulnerability exists in LibreNMS (<= 25.6.0) in the Alert Template creation feature. This allows a user with the admin role to inject malicious JavaScript, which will be executed when the template is rendered, potentially compromising other admin accounts. This vulnerability is fixed in 25.8.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.128 (96.2th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-55296: rose from 0.119 to 0.128.

EPSS over last 30 days · oldest: 0.119 · newest: 0.128 · change: +0.010

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-55296?
CVE-2025-55296 is a medium-severity vulnerability in Librenms, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2025-08-18.
How severe is CVE-2025-55296?
Medium severity. CVSS v3 base score is 5.5 out of 10.