CVE-2023-6239Network attack vector

Unauthorized object access via faulty permission calculation

Published Nov 28, 2023 · Updated Feb 23, 2026

Improper permission preservation in M-Files Server 23.9, 23.10, and 23.11 before 23.11.13168.7 allows remote authenticated users to access objects. The effective-permission calculation returns a faulty result for objects using a specific configuration of metadata-driven permissions. A low-privileged account and the rare permission configuration are required; affected users can access objects outside their assigned rights.

CVSS severity5.4
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper permission preservation in M-Files Server 23.9, 23.10, and 23.11 before 23.11.13168.7 allows remote authenticated users to access objects. The effective-permission calculation returns a faulty result for objects using a specific configuration of metadata-driven permissions. A low-privileged account and the rare permission configuration are required; affected users can access objects outside their assigned rights.

The record

CVE
CVE-2023-6239
Published
Nov 28, 2023
Updated
Feb 23, 2026
Vendor
M-Files
Product
M-Files Server
Classifications
CWE-281, CAPEC-180, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=23.10
  2. Affected versionversion=23.11 <23.11.13168.7
  3. Affected versionversion=23.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

M-Files · M-Files Serverversion=23.10; version=23.11 <23.11.13168.7; version=23.9

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.4M-Files CorporationCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-281Improper Preservation of Permissions
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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