CVE-2022-28202

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-30 · updated 2026-06-17
Weakness: CWE-79

Description

An XSS issue was discovered in MediaWiki before 1.35.6, 1.36.x before 1.36.4, and 1.37.x before 1.37.2. The widthheight, widthheightpage, and nbytes properties of messages are not escaped when used in galleries or Special:RevisionDelete.

Affected products

Debian Linux: 10.0
Fedoraproject Fedora: 36
Wikimedia Foundation MediaWiki: before 1.35.6; from 1.36.0 before 1.36.4; from 1.37.0 before 1.37.2 — fixed in 1.35.6, 1.36.4, 1.37.2

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.6, 1.36.4, 1.37.2. Check the vendor advisory for mitigations.

References

https://lists.debian.org/debian-lts-announce/2022/09/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PT4CHJKOQOVMI65TSNZRNV6FIWU7SGZD/
https://phabricator.wikimedia.org/T297543
https://security.gentoo.org/glsa/202305-24
https://www.debian.org/security/2022/dsa-5246
https://lists.debian.org/debian-lts-announce/2022/09/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PT4CHJKOQOVMI65TSNZRNV6FIWU7SGZD/
https://phabricator.wikimedia.org/T297543
https://security.gentoo.org/glsa/202305-24
https://www.debian.org/security/2022/dsa-5246

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