Wikimedia CheckUser up to 1.43.3/1.44.0 GlobalContributionsPager.Php information disclosure

Summaryinfo

A vulnerability was found in Wikimedia CheckUser up to 1.43.3/1.44.0. It has been declared as problematic. Affected is an unknown function of the file src/GlobalContributions/GlobalContributionsPager.Php. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2025-61658. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Wikimedia CheckUser up to 1.43.3/1.44.0 and classified as problematic. This vulnerability affects some unknown processing of the file src/GlobalContributions/GlobalContributionsPager.Php. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/GlobalContributions/GlobalContributionsPager.Php. This issue affects CheckUser: from * before 1.43.4, 1.44.1.

The advisory is shared for download at phabricator.wikimedia.org. This vulnerability was named CVE-2025-61658 since 09/29/2025. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

By approaching the search of inurl:src/GlobalContributions/GlobalContributionsPager.Php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.43.4 or 1.44.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-206654). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Wikimedia

Name

• CheckUser

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.43.0
• 1.43.1
• 1.43.2
• 1.43.3
• 1.44.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Exploitinginfo

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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