CVE-2021-30156

Medium

Description

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Special:Contributions can leak that a "hidden" user exists.

SeverityMedium

CVSS4.3

Exploit probability—

Product

Mediawiki

PublishedApr 9, 2021

First seenApr 9, 2021

How to fix

Update

mediawiki mediawiki1.31.12, 1.35.2 or later

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/

Affected products

Product	Affected versions	Fixed in
mediawiki mediawiki	v < 1.31.12, 1.32.0 ≤ v < 1.35.2	1.31.12, 1.35.2
fedoraproject fedora	33, 34	—

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