What is CVE-2023-4158?

CVE-2023-4158 is a medium-severity vulnerability in Omeka Omeka/omeka-S, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-04.

How severe is CVE-2023-4158?

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

XSS in Omeka Omeka/omeka-S

CVE-2023-4158

Cross-site Scripting (XSS) - Stored in GitHub repository omeka/omeka-s prior to 4.0.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-08-04 · 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: 0.005 (37.7th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Omeka Omeka/omeka-S — versions unspecified
Omeka S

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

huntr.dev/bounties/e0e462ae-d7cb-4a84-b6fe-5f5de20e3d15 (Exploit, Patch, Third Party Advisory)
github.com/omeka/omeka-s/commit/2a7fb26452167c8a1d95f207ae5328c6b1b0fcf8 (Patch)

Frequently asked questions

What is CVE-2023-4158?: CVE-2023-4158 is a medium-severity vulnerability in Omeka Omeka/omeka-S, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-04.
How severe is CVE-2023-4158?: Medium severity. CVSS v3 base score is 5.4 out of 10.