An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. Special:CheckUserLog allows CheckUser XSS because of date mishandling, as demonstrated by an XSS payload in MediaWiki:October.

According to its self-reported version number, the instance of MediaWiki hosted on the remote web server is prior to 1.35.5, 1.36.x prior to 1.36.3 or 1.37 prior to 1.37.1, It is, therefore, affected by a number of vulnerabilities as follows.

- A vulnerability in the date validation functions of Special:CheckUserLog enabling XSS attacks.

- A flaw with length validation routines in Language Name Search in api.php leading to a denial of service when a very long key is used in the search.

- A flaw in MassEditRegex whereby it does not correctly check for CSRF tokens making it vulnerable to attack.

- A vulnerability in WikibaseMediaInfo's handling of caption fields enabling XSS attacks.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
113992	MediaWiki 1.37.x < 1.37.1 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
113991	MediaWiki 1.36.x < 1.36.3 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
113990	MediaWiki < 1.35.5 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high

Detections

Analytics

CVE-2021-46150

medium

Tenable Plugins

high

high

high