Description
An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.
Remediation
References
Related Vulnerabilities
WordPress Plugin Multisite Post Duplicator Cross-Site Request Forgery (0.9.5.1)
WordPress Improper Input Validation Vulnerability (CVE-2014-9038)
WordPress Plugin Husker Portfolio Cross-Site Request Forgery (0.3)
Jenkins Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2017-1000395)