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Vulnerability of MediaWiki: Cross Site Scripting via User-generated CSS Selectors

Synthesis of the vulnerability 

An attacker can trigger a Cross Site Scripting via User-generated CSS Selectors of MediaWiki, in order to run JavaScript code in the context of the web site.
Impacted systems: Debian.
Severity of this alert: 2/4.
Creation date: 03/04/2020.
Références of this alert: CVE-2020-10960, DSA-4651-1, VIGILANCE-VUL-31931.

Description of the vulnerability 

An attacker can trigger a Cross Site Scripting via User-generated CSS Selectors of MediaWiki, in order to run JavaScript code in the context of the web site.
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This computer vulnerability note impacts software or systems such as Debian.

Our Vigil@nce team determined that the severity of this computer vulnerability announce is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this cybersecurity announce.

Solutions for this threat 

Debian 10: new mediawiki packages.
New packages are available:
  Debian 10: mediawiki 1:1.31.7-1~deb10u1
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