Description
includes/libs/IEUrlExtension.php in the MediaWiki API in MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 does not properly detect extensions when there are an even number of "." (period) characters in a string, which allows remote attackers to conduct cross-site scripting (XSS) attacks via the siprop parameter in a query action to wiki/api.php.
Remediation
References
Related Vulnerabilities
WordPress User-Agent SQL Injection Vulnerability (1.5.2)
Oracle Database Server CVE-2015-4753 Vulnerability (CVE-2015-4753)
PHP Other Vulnerability (CVE-2007-1475)
WordPress Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2017-5492)
WordPress Plugin CKEditor for WordPress Cross-Site Scripting (4.5.3)