CVE-2021-30157

MEDIUM

MediaWiki < 1.31.12 and 1.32.x-1.35.x < 1.35.2 - Stored Cross-Site Scripting in ChangesList Filter Labels

Title source: llm

Description

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On ChangesList special pages such as Special:RecentChanges and Special:Watchlist, some of the rcfilters-filter-* label messages are output in HTML unescaped, leading to XSS.

References (5)

Core 5

Core References

Exploit, Issue Tracking, Patch, Vendor Advisory x_refsource_misc

https://phabricator.wikimedia.org/T278058

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2021/dsa-4889

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/202107-40

Scores

CVSS v3 6.1

EPSS 0.0073

EPSS Percentile 73.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE

CWE-79

Status published

Products (4)

debian/debian_linux 10.0

fedoraproject/fedora 33

fedoraproject/fedora 34

mediawiki/mediawiki < 1.31.12

Published Apr 06, 2021

Tracked Since Feb 18, 2026