CVE-2023-6239: Incorrect calculation of effective permissions

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-11-28 · updated 2026-06-17
Weakness: CWE-281

Description

Under rare conditions, the effective permissions of an object might be incorrectly calculated if the object has a specific configuration of metadata-driven permissions in M-Files Server versions 23.9, 23.10, and 23.11 before 23.11.13168.7, potentially enabling unauthorized access to the object.

Affected products

M-Files Corporation M-Files Server: from 23.11 before 23.11.13168.7; 23.9, 23.10 — fixed in 23.11.13168.7

How to fix

Upgrade to a fixed version: M-Files Corporation M-Files Server 23.11.13168.7. Check the vendor advisory for mitigations.

References

https://empower.m-files.com/security-advisories/CVE-2023-6239
https://product.m-files.com/security-advisories/cve-2023-6239/
https://www.m-files.com/about/trust-center/security-advisories/cve-2023-6239/

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