CVE-2023-37252 - Vulnerability Details - OpenCVE

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00197.

Exploitation poc

Automatable no

Technical Impact partial

Vendors	Products
Mediawiki Subscribe	Checkuser Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Mediawiki Subscribe	Checkuser Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://phabricator.wikimedia.org/T330968

History

Mon, 14 Sep 2026 23:30:00 +0000

Type	Values Removed	Values Added
Title		Hidden Usernames Leak in MediaWiki CheckUser Extension

Mon, 14 Sep 2026 21:00:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 14 Sep 2026 05:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Mediawiki Mediawiki checkuser
Weaknesses		CWE-669
CPEs		cpe:2.3:a:mediawiki:checkuser::::::::
Vendors & Products		Mediawiki Mediawiki checkuser
Metrics		cvssV3_1 `{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}`

Mon, 14 Sep 2026 05:15:00 +0000

Type	Values Removed	Values Added
Description		An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.
References		https://phabricator.wikimedia.org/T330968

Projects

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MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-14T00:00:00.000Z

Updated: 2026-09-14T16:16:59.396Z

Reserved: 2023-06-29T00:00:00.000Z

Link: CVE-2023-37252

Vulnrichment

Updated: 2026-09-14T16:16:53.651Z

NVD

Status : Received

Published: 2026-09-14T05:16:57.580

Modified: 2026-09-14T17:17:41.763

Link: CVE-2023-37252

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-09-14T23:15:09Z

Weaknesses

CWE-669

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