What is CVE-2023-4979?

CVE-2023-4979 is a medium-severity vulnerability in Librenms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-09-15.

How severe is CVE-2023-4979?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Librenms

CVE-2023-4979

Cross-site Scripting (XSS) - Reflected in GitHub repository librenms/librenms prior to 23.9.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001

Affected products

Librenms
Librenms Librenms/librenms — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

huntr.dev/bounties/e67f8f5d-4048-404f-9b86-cb6b8719b77f (Exploit, Patch, Third Party Advisory)
github.com/librenms/librenms/commit/49d66fa31b43acef02eaa09ee9af15fe7e16cd03 (Patch)

Frequently asked questions

What is CVE-2023-4979?: CVE-2023-4979 is a medium-severity vulnerability in Librenms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-09-15.
How severe is CVE-2023-4979?: Medium severity. CVSS v3 base score is 5.4 out of 10.