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).

How to fix CVE-2020-10960

To remediate CVE-2020-10960, upgrade the affected package to a fixed version below.

• —upgrade to 1.34.1 or later
• —upgrade to 1:1.31.7-1 or later
• —upgrade to 1:1.31.7-1~deb10u1 or later
• —upgrade to 1.31.7 or later

Is CVE-2020-10960 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 1.34.1
• from 0, < 1:1.31.7-1
• from 0, < 1:1.31.7-1~deb10u1
• >= 1.31.0, < 1.31.7

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-10960
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2020-10960
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-10960.yaml
• WEBlists.wikimedia.org/pipermail/wikitech-l/2020-March/093243.html