CVE-2021-30156

PoC —

CVSS 3.1

4.3 medium

EPSS

1%p66

Published

Apr 9, 2021 (Apr 9, 2021)

Modified

Jun 17, 2026

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.

Vendors: mediawiki fedoraproject
Products: mediawiki, fedora
Weakness: CWE-200
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (1.2%)

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