CVE-2025-61658Network attack vector

Restricted-wiki edit disclosure via missing access filtering

Published Feb 3, 2026 · Updated Feb 3, 2026

Authorization bypass in Wikimedia Foundation CheckUser before 1.43.4 and 1.44.1 allows remote authenticated users to view restricted-wiki edits. GlobalContributionsPager queries the central contribution index and returns edits without excluding wikis where the viewer lacks read access. An account able to open Special:GlobalContributions can disclose edit records from otherwise inaccessible wikis; no write or service impact is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Wikimedia Foundation CheckUser before 1.43.4 and 1.44.1 allows remote authenticated users to view restricted-wiki edits. GlobalContributionsPager queries the central contribution index and returns edits without excluding wikis where the viewer lacks read access. An account able to open Special:GlobalContributions can disclose edit records from otherwise inaccessible wikis; no write or service impact is reported.

The record

CVE
CVE-2025-61658
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Wikimedia Foundation
Product
CheckUser
Classifications
CWE-22, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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=* <1.43.4, 1.44.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wikimedia Foundation · CheckUserversion=* <1.43.4, 1.44.1

Published CVSS scores

1.3Wikimedia FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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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