CVE-2022-4861Network attack vector

Cross-resource token disclosure via flawed authentication protocol

Published Dec 30, 2022 · Updated Feb 23, 2026

Improper authentication in M-Files Client before 22.5.11356.0 allows remote authenticated users to obtain other users' resource tokens. M-Files identifies the authentication protocol as the affected locus but has not published the incorrect token-validation operation. Exploitation requires server administrator privileges and user interaction; successful use exposes tokens belonging to other users for a different resource.

CVSS severity4.8
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in M-Files Client before 22.5.11356.0 allows remote authenticated users to obtain other users' resource tokens. M-Files identifies the authentication protocol as the affected locus but has not published the incorrect token-validation operation. Exploitation requires server administrator privileges and user interaction; successful use exposes tokens belonging to other users for a different resource.

The record

CVE
CVE-2022-4861
Published
Dec 30, 2022
Updated
Feb 23, 2026
Vendor
M-Files
Product
M-Files Client
Classifications
CWE-303, CWE-287, CAPEC-114, T1528
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 30, 2022CVE 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 <22.5.11356.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

M-Files · M-Files Clientversion=0 <22.5.11356.0

Published CVSS scores

4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.8M-Files CorporationCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-303Incorrect Implementation of Authentication Algorithm
CWE-287Improper Authentication
CAPEC-114Authentication Abuse
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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