Vulnerability Details : CVE-2021-30156
Potential exploit
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.
Vulnerability category: Information leak
Products affected by CVE-2021-30156
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-30156
0.19%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 38 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-30156
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:P/A:N |
8.0
|
2.9
|
NIST | |
|
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
2.8
|
1.4
|
NIST |
CWE ids for CVE-2021-30156
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-30156
-
https://phabricator.wikimedia.org/T276306
⚓ T276306 CVE-2021-30156: Special:Contributions toolbar reveals existence of hidden usersExploit;Patch;Vendor Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/
[SECURITY] Fedora 33 Update: mediawiki-1.35.2-1.fc33 - package-announce - Fedora Mailing-ListsThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/
[SECURITY] Fedora 34 Update: mediawiki-1.35.2-1.fc34 - package-announce - Fedora Mailing-ListsThird Party Advisory
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