What is CVE-2023-4347?

CVE-2023-4347 is a medium-severity vulnerability in Librenms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-15.

How severe is CVE-2023-4347?

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

XSS in Librenms

CVE-2023-4347

Cross-site Scripting (XSS) - Reflected in GitHub repository librenms/librenms prior to 23.8.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-08-15 · 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: 0.697 (99.4th percentile), scored 2026-10-17.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.697 · newest: 0.697 · change: 0.000

Affected products

Librenms
Librenms Librenms/librenms — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

huntr.dev/bounties/1f78c6e1-2923-46c5-9376-4cc5a8f1152f (Exploit, Third Party Advisory)
github.com/librenms/librenms/commit/91c57a1ee54631e071b6b0c952d99c8ee892e824 (Patch)

Frequently asked questions

What is CVE-2023-4347?: CVE-2023-4347 is a medium-severity vulnerability in Librenms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-15.
How severe is CVE-2023-4347?: Medium severity. CVSS v3 base score is 5.4 out of 10.