CVE-2020-35474

MEDIUM

MediaWiki < 1.35.1 - Stored Cross-Site Scripting via MediaWiki:recentchanges-legend-watchlistexpiry

Title source: llm

Description

In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.

References (3)

Core 3

Core References

Exploit, Third Party Advisory x_refsource_misc

https://phabricator.wikimedia.org/T268894

Mailing List, Release Notes, Vendor Advisory x_refsource_misc

https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/

Scores

CVSS v3 6.1

EPSS 0.0047

EPSS Percentile 64.7%

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 (2)

fedoraproject/fedora 33

mediawiki/mediawiki < 1.35.1

Published Dec 18, 2020

Tracked Since Feb 18, 2026