Cross-site scripting (XSS) vulnerability in the Frontend Login Box (aka felogin) subcomponent in TYPO3 4.2.0 through 4.2.6 allows remote attackers to inject arbitrary web script or HTML via unspecified parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53926
http://www.vupen.com/english/advisories/2009/3009
http://www.securityfocus.com/bid/36801
http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-016/
http://secunia.com/advisories/37122