vulnerability
Ubuntu: (CVE-2021-30156): mediawiki vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:L/Au:S/C:N/I:P/A:N) | Apr 9, 2021 | Jun 26, 2025 | Mar 27, 2026 |
Severity
4
CVSS
(AV:N/AC:L/Au:S/C:N/I:P/A:N)
Published
Apr 9, 2021
Added
Jun 26, 2025
Modified
Mar 27, 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.
Solution
no-fix-ubuntu-package
References
- CVE-2021-30156
- https://attackerkb.com/topics/CVE-2021-30156
- CWE-200
- EUVD-EUVD-2021-17092
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-17092
- https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/63559cc944efeb514ba9e011c824c3698fb397f2%5E%21/
- https://phabricator.wikimedia.org/T276306
- https://www.cve.org/CVERecord?id=CVE-2021-30156
Rapid7 Labs
2026 Global Threat Landscape Report
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