CVE-2020-35474 Information

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.

CVSS Vector

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

Reference

https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html https://phabricator.wikimedia.org/T268894 https://lists.fedoraproject.org/archives/list/[email protected]/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.1