MediaWiki Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2013-6454
Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.10 1.2x before 1.21.4 and 1.22.x before 1.22.1 allows remote attackers to inject arbitrary web script or HTML via a -o-link attribute.