Cross-site scripting (XSS) vulnerability in the BE User Switch (beuserswitch) extension 0.0.1 for TYPO3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/72974
http://www.securityfocus.com/bid/51852
http://typo3.org/teams/security/security-bulletins/typo3-extensions/typo3-ext-sa-2012-001/