CheckUser on Wikimedia UserInfoHandler.Php information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in CheckUser on Wikimedia. This vulnerability affects unknown code of the file src/Api/Rest/Handler/UserInfoHandler.Php. Performing a manipulation results in information disclosure. This vulnerability is reported as CVE-2025-61647. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in CheckUser on Wikimedia (version now known). It has been classified as problematic. This affects some unknown processing of the file src/Api/Rest/Handler/UserInfoHandler.Php. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Api/Rest/Handler/UserInfoHandler.Php. This issue affects CheckUser: from a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4.

The advisory is shared at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2025-61647 since 09/29/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

By approaching the search of inurl:src/Api/Rest/Handler/UserInfoHandler.Php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-206645). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/29/2025 CVE reserved
02/03/2026 +127 days Advisory disclosed
02/03/2026 +0 days VulDB entry created
03/03/2026 +28 days VulDB entry last update

Sourcesinfo

Advisory: phabricator.wikimedia.org
Status: Confirmed

CVE: CVE-2025-61647 (🔒)
GCVE (CVE): GCVE-0-2025-61647
GCVE (VulDB): GCVE-100-343797
EUVD: 🔒

Entryinfo

Created: 02/03/2026 07:26
Updated: 03/03/2026 18:05
Changes: 02/03/2026 07:26 (65), 02/04/2026 05:03 (1), 02/04/2026 11:30 (1), 03/03/2026 18:05 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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