Wikimedia CheckUser up to 1.44.0 ShowIPButton.Vue cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in Wikimedia CheckUser up to 1.44.0. This affects an unknown part of the file modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2025-61648. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wikimedia CheckUser up to 1.44.0 and classified as problematic. This issue affects some unknown processing of the file modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js. This issue affects CheckUser: from * before 1.44.1.

It is possible to read the advisory at phabricator.wikimedia.org. The identification of this vulnerability is CVE-2025-61648 since 09/29/2025. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation requires an enhanced level of successful 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. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.44.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202602-524) and EUVD (EUVD-2025-206640). 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
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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