Vulnerability 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.
CVSS Score
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | < 1.31.12 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://phabricator.wikimedia.org/T276306ExploitPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://phabricator.wikimedia.org/T276306ExploitPatchVendor Advisory
FAQ
What is CVE-2021-30156?
CVE-2021-30156 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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.
How severe is CVE-2021-30156?
CVE-2021-30156 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-30156?
Check the references section above for vendor advisories and patch information. Affected products include: Mediawiki Mediawiki, Fedoraproject Fedora.