What is CVE-2021-44857?

CVE-2021-44857 is a medium-severity vulnerability in Mediawiki, classified under Missing Authorization. CVSS score: 6.5/10. Published 2021-12-17.

How severe is CVE-2021-44857?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Mediawiki

CVE-2021-44857

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. It is possible to use action=mcrundo followed by action=mcrrestore to replace the content of any arbitrary page (that the user doesn't have edit rights for). This applies to any public wiki, or a private wiki that has at least one page set in $wgWhitelistRead.

Vulnerability class: Broken Access Control

EPSS: 0.009 (55.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Mediawiki
N/a — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

cve@mitre.org (Third Party Advisory)
cve@mitre.org (Vendor Advisory)
cve@mitre.org (vendor-advisory)

Frequently asked questions

What is CVE-2021-44857?: CVE-2021-44857 is a medium-severity vulnerability in Mediawiki, classified under Missing Authorization. CVSS score: 6.5/10. Published 2021-12-17.
How severe is CVE-2021-44857?: Medium severity. CVSS v3 base score is 6.5 out of 10.