CVE-2021-30156
MEDIUMCVSS 4.3/10EPSS 1.18%
Last modified
CVE-2021-30156 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | < 1.31.12 |
| Mediawiki | Mediawiki | >= 1.32.0, < 1.35.2 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- https://phabricator.wikimedia.org/T276306Exploit, Patch, Vendor Advisory
- https://phabricator.wikimedia.org/T276306Exploit, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30156?
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 a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30156?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-30156?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST