CVE-2023-2480

Privilege escalation via unchecked UI extension permissions

Published May 25, 2023 · Updated Feb 23, 2026

Missing authorization in M-Files Client before 23.5.12598.0 allows local users to elevate privileges through UI extension applications. The client fails to enforce required access-permission checks when a UI extension application requests privileged functionality. Exploitation requires a low-privileged user to connect to an attacker-controlled external vault and separately accept its application, enabling unauthorized access to or alteration of protected data.

CVSS severity7.5
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in M-Files Client before 23.5.12598.0 allows local users to elevate privileges through UI extension applications. The client fails to enforce required access-permission checks when a UI extension application requests privileged functionality. Exploitation requires a low-privileged user to connect to an attacker-controlled external vault and separately accept its application, enabling unauthorized access to or alteration of protected data.

The record

CVE
CVE-2023-2480
Published
May 25, 2023
Updated
Feb 23, 2026
Vendor
M-Files
Product
M-Files Client
Classifications
CWE-280, CWE-862, CAPEC-212, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 25, 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=0 <23.5.12598.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

M-Files · M-Files Clientversion=0 <23.5.12598.0

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5M-Files CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-280Improper Handling of Insufficient Permissions or Privileges
CWE-862Missing Authorization
CAPEC-212Functionality Misuse
T1068Exploitation for Privilege Escalation

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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