Wikimedia CheckUser up to 1.39.13/1.43.3/1.44.0 UserMailer.Php Remote Code Execution

Summaryinfo

A vulnerability identified as critical has been detected in Wikimedia CheckUser up to 1.39.13/1.43.3/1.44.0. This affects an unknown part of the file includes/Mail/UserMailer.Php. This manipulation causes an unknown weakness. This vulnerability is tracked as CVE-2025-67478. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Wikimedia CheckUser up to 1.39.13/1.43.3/1.44.0. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the file includes/Mail/UserMailer.Php. The impact remains unknown. The summary by CVE is:

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php. This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.

It is possible to read the advisory at phabricator.wikimedia.org. This vulnerability is known as CVE-2025-67478 since 12/08/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:includes/Mail/UserMailer.Php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.39.14, 1.43.4 or 1.44.1 eliminates this vulnerability.

Be aware that VulDB is the high quality 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
• 1.39.0
• 1.39.1
• 1.39.2
• 1.39.3
• 1.39.4
• 1.39.5
• 1.39.6
• 1.39.7
• 1.39.8
• 1.39.9
• 1.39.10
• 1.39.11
• 1.39.12
• 1.39.13
• 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

Threat Intelligenceinfo

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Timelineinfo

Sourcesinfo

Entryinfo

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