CVE-2015-5956
The sanitizeLocalUrl function in TYPO3 6.x before 6.2.15, 7.x before 7.4.0, 4.5.40, and earlier allows remote authenticated users to bypass the XSS filter and conduct cross-site scripting (XSS) attacks via a base64 encoded data URI, as demonstrated by the (1) returnUrl parameter to show_rechis.php and the (2) redirect_url parameter to index.php.
Date published : 2015-09-16
http://www.securityfocus.com/archive/1/536464/100/0/threaded
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2015-009/