Vulnerability · Published Apr 3, 2020 · Assigned by mitre

CVE-2020-10960

Medium 5.3

In plain English

A medium-severity security flaw in the mediawiki package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.3Medium

Exploit odds (30 days)1.2%top 32.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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 & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	mediawiki	1:1.31.7-1	DEBIAN-CVE-2020-10960
Debian:13	mediawiki	1:1.31.7-1	DEBIAN-CVE-2020-10960
Debian:14	mediawiki	1:1.31.7-1	DEBIAN-CVE-2020-10960
Packagist	mediawiki/core	1.31.7	GHSA-pfm2-mqwj-ggm5
Packagist	mediawiki/core	1.33.3	GHSA-pfm2-mqwj-ggm5
Packagist	mediawiki/core	1.34.1	GHSA-pfm2-mqwj-ggm5

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://phabricator.wikimedia.org/T246602 x_refsource_CONFIRM
https://lists.wikimedia.org/pipermail/wikitech-l/2020-March/093243.html x_refsource_CONFIRM