Description
An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.
Published: 2026-09-14
Score: 3.1 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

No advisories yet.

References
Link Providers
https://phabricator.wikimedia.org/T330968 cve-icon cve-icon cve-icon
History

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

Subscriptions

Mediawiki Checkuser
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

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

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

Link: CVE-2023-37252

cve-icon Vulnrichment

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

cve-icon NVD

Status : Received

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

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

Link: CVE-2023-37252

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-14T12:15:19Z

Weaknesses
  • CWE-669

    Incorrect Resource Transfer Between Spheres