What is CVE-2023-4159?

CVE-2023-4159 is a high-severity vulnerability in Omeka Omeka/omeka-S, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-08-04.

How severe is CVE-2023-4159?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2023-4159 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Omeka Omeka/omeka-S

CVE-2023-4159

Unrestricted Upload of File with Dangerous Type in GitHub repository omeka/omeka-s prior to 4.0.3.

Vulnerability class: Unrestricted File Upload

Published 2023-08-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.2th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Omeka Omeka/omeka-S — versions unspecified
Omeka S

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

huntr.dev/bounties/e2e2365e-6a5f-4ca4-9ef1-297e3ed41f9c (Exploit, Patch, Third Party Advisory)
github.com/omeka/omeka-s/commit/2a7fb26452167c8a1d95f207ae5328c6b1b0fcf8 (Patch)

Frequently asked questions

What is CVE-2023-4159?: CVE-2023-4159 is a high-severity vulnerability in Omeka Omeka/omeka-S, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-08-04.
How severe is CVE-2023-4159?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-4159 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.