How severe is CVE-2023-4159?

CVE-2023-4159 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-4159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4159?

CVE-2023-4159 affects Omeka Omeka S. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4159?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-4159 published?

CVE-2023-4159 was published on 2023-08-04 and last updated on 2026-06-17.

CVE-2023-4159

CVE-2023-4159 is a high-severity vulnerability in Omeka Omeka S with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Omeka Omeka S
Published: 2023-08-04
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-4159?: Unrestricted Upload of File with Dangerous Type in GitHub repository omeka/omeka-s prior to 4.0.3.
How severe is CVE-2023-4159?: CVE-2023-4159 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-4159 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4159?: CVE-2023-4159 affects Omeka Omeka S. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4159?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-4159 published?: CVE-2023-4159 was published on 2023-08-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:omeka:omeka_s:*:*:*:*:*:*:*:*

More vulnerabilities in Omeka Omeka S

CVE-2023-4560 — Medium (CVSS 6.5): Improper Authorization of Index Containing Sensitive Information in GitHub repository omeka/omeka-s prior to 4.0.4.
CVE-2023-4158 — Medium (CVSS 5.4): Cross-site Scripting (XSS) - Stored in GitHub repository omeka/omeka-s prior to 4.0.3.
CVE-2023-4157 — Medium (CVSS 5.2): CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in GitHub…
CVE-2023-4561 — Medium (CVSS 4.8): Cross-site Scripting (XSS) - Stored in GitHub repository omeka/omeka-s prior to 4.0.4.

All CVEs affecting Omeka Omeka S →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-39770 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in Doctreat <= 1.7.0 versions.
CVE-2026-32579 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in Kognetiks Chatbot for WordPress <= 2.4.9 versions.
CVE-2026-102427 — Critical (CVSS 10.0): Joomla Extension - ordasoft.com - Unauthenticated Remote Code Execution in OrdaSoft Joomla CCK < 8.3.16 -…
CVE-2026-4357 — Critical (CVSS 10.0): The Embed HTML5 Game WordPress plugin through 1.3 does not properly restrict who can upload files via the plugin, as…
CVE-2026-84147 — Critical (CVSS 10.0): This vulnerability exists in the ERP system due to improper authentication controls and inadequate file type validation…
CVE-2026-81780 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in Hash Form <= 1.4.2 versions.

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →