What is CVE-2021-30156?

CVE-2021-30156 is a medium-severity vulnerability in MediaWiki, classified under Information Disclosure. CVSS score: 4.3/10. Published 2021-04-09.

How severe is CVE-2021-30156?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in MediaWiki

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.

Vulnerability class: Information Disclosure

EPSS: 0.012 (64.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Mediawiki
Fedoraproject Fedora — versions 33, 34
N/a — versions n/a

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

cve@mitre.org (Exploit, Patch, x_refsource_MISC, Vendor Advisory)
cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
cve@mitre.org (x_refsource_FEDORA, vendor-advisory)

Frequently asked questions

What is CVE-2021-30156?: CVE-2021-30156 is a medium-severity vulnerability in MediaWiki, classified under Information Disclosure. CVSS score: 4.3/10. Published 2021-04-09.
How severe is CVE-2021-30156?: Medium severity. CVSS v3 base score is 4.3 out of 10.