Description
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.
References (2)
Core 2
Core References
Patch, Vendor Advisory x_refsource_misc
https://phabricator.wikimedia.org/T234862
Patch, Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/q/Ie0aa0df2b3f03d8b910733f1b5e600a0dc978765
Scores
CVSS v3
6.5
EPSS
0.0034
EPSS Percentile
56.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-200
Status
published
Products (1)
mediawiki/checkuser
< 1.34
Published
Oct 29, 2019
Tracked Since
Feb 18, 2026