What is CVE-2022-28201?

CVE-2022-28201 is a medium-severity vulnerability in MediaWiki, classified under Uncontrolled Recursion. CVSS score: 4.4/10. Published 2022-09-19.

How severe is CVE-2022-28201?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in MediaWiki

CVE-2022-28201

An issue was discovered in MediaWiki before 1.35.6, 1.36.x before 1.36.4, and 1.37.x before 1.37.2. Users with the editinterface permission can trigger infinite recursion, because a bare local interwiki is mishandled for the mainpage message.

Published 2022-09-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (34.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

MediaWiki
Debian Linux — versions 10.0, 11.0

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

phabricator.wikimedia.org/T297571 (Patch, Vendor Advisory)
blog.legoktm.com/2022/07/03/a-belated-writeup-of-cve-2022-28201-in-mediawiki.ht… (Exploit, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/09/msg00027.html (mailing-list, Mailing List, Third Party Advisory)
www.debian.org/security/2022/dsa-5246 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2022-28201?: CVE-2022-28201 is a medium-severity vulnerability in MediaWiki, classified under Uncontrolled Recursion. CVSS score: 4.4/10. Published 2022-09-19.
How severe is CVE-2022-28201?: Medium severity. CVSS v3 base score is 4.4 out of 10.