CVE-2020-10960

MEDIUM5.3EPSS 0.21%

MediaWiki makeCollapsible allows applying event handler to any CSS selector

Published: 5/24/2022Modified: 4/28/2026

Also known as:GHSA-pfm2-mqwj-ggm5BIT-mediawiki-2020-10960DEBIAN-CVE-2020-10960

Description

In MediaWiki before 1.34.1, users can add various Cascading Style Sheets (CSS) classes (which can affect what content is shown or hidden in the user interface) to arbitrary DOM nodes via HTML content within a MediaWiki page. This occurs because jquery.makeCollapsible allows applying an event handler to any Cascading Style Sheets (CSS) selector. There is no known way to exploit this for cross-site scripting (XSS).

Affected packages (4)

Bitnami/mediawikifrom 0, < 1.34.1
Debian/mediawikifrom 0, < 1:1.31.7-1
Debian/mediawikifrom 0, < 1:1.31.7-1~deb10u1
Packagist/mediawiki/core>= 1.31.0, < 1.31.7

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References (5)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-10960
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-10960
WEBhttps://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-10960.yaml
WEBhttps://lists.wikimedia.org/pipermail/wikitech-l/2020-March/093243.html
WEBhttps://phabricator.wikimedia.org/T246602