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TI-2019-13460 Aliases CVE-2019-18611GHSA-w3xh-g4rp-pcfc

An issue was discovered in the CheckUser extension through 1.34 for MediaWiki.

Priority LOW 31CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

An issue was discovered in the CheckUser extension through 1.34 for MediaWiki. Certain sensitive information within oversighted edit summaries made available via the MediaWiki API was potentially visible to users with various levels of access to this extension. Said users should not have been able to view these oversighted edit summaries via the MediaWiki API.

Why it matters now

EPSS 0.00926 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:mediawiki:*:*up to 1.34Vulnerablemediawiki
  • cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:mediawiki:*:* Versions up to 1.34 Vulnerable ·mediawiki

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-18611
  2. 2026-10-03 Alias added: GHSA-w3xh-g4rp-pcfc

References

Patch 2

  • TI-2015-02594 Cross-site request forgery (CSRF) vulnerability in the CheckUser extension for MediaWiki… CVSS 2.0MEDIUM 6.8
  • TI-2019-12392 An issue was discovered in the CheckUser extension through 1.35.0 for MediaWiki. CVSS 3.1MEDIUM 5.3
  • TI-2026-26412 Suggested investigations: Handle suppressed usernames CVSS 4.0MEDIUM 4.8
  • TI-2025-41237 Wrong E-Mail address composition for usernames with a comma and Umlauts in it like "Döe, Jähn" CVSS 4.0N/A 0.0
  • TI-2025-38092 Special:GlobalContributions shows edits on wikis the viewer doesn't have access to CVSS 4.0LOW 1.3
  • TI-2025-38085 i18n XSS through Special:CheckUser CheckUser helper CVSS 4.0N/A 0.0
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences