CVE-2024-34502

mediawiki: MergeLexemes makes edits on GET requests without edit tokens

Published May 5, 2024 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
An issue was discovered in WikibaseLexeme in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. Loading Special:MergeLexemes will (attempt to) make an edit that merges the from-id to the to-id, even if the request was not a POST request, and even if it does not contain an edit token.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Fedoraproject
Fedoraproject fedora
Mediawiki
Mediawiki mediawiki
CPEs cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*
Vendors & Products Fedoraproject
Fedoraproject fedora
Mediawiki
Mediawiki mediawiki
Type Values Removed Values Added
Weaknesses CWE-352
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Nov 4, 2025, 5:20 PM
Reserved
May 5, 2024, 12:00 AM
Status
Modified
Published
May 5, 2024, 7:15 PM
Modified
Jun 17, 2026, 7:33 AM
Severity
Moderate
Public date
May 5, 2024, 12:00 AM