Description
An issue was discovered in MediaWiki before 1.37.3 and 1.38.x before 1.38.1. The contributions-title, used on Special:Contributions, is used as page title without escaping. Hence, in a non-default configuration where a username contains HTML entities, it won't be escaped.
Remediation
References
Related Vulnerabilities
Internet Information Services Other Vulnerability (CVE-2002-0364)
WordPress Plugin iThemes Exchange:Simple WP Ecommerce Cross-Site Scripting (1.11.18)
MySQL CVE-2012-0117 Vulnerability (CVE-2012-0117)
Moodle Improper Input Validation Vulnerability (CVE-2020-1756)
phpMyFAQ 7PK - Security Features Vulnerability (CVE-2014-6050)