The be_user_creation task in TYPO3 4.2.x before 4.2.15 and 4.3.x before 4.3.7 allows remote authenticated users to gain privileges via a crafted POST request that creates a user account with arbitrary group memberships.

Multiple cross-site scripting (XSS) vulnerabilities in TYPO3 4.2.x before 4.2.15, 4.3.x before 4.3.7, and 4.4.x before 4.4.4 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) the RemoveXSS function, and allow remote authenticated users to inject arbitrary web script or HTML via vectors related to (2) the backend.

The t3lib_div::validEmail function in TYPO3 4.2.x before 4.2.15, 4.3.x before 4.3.7, and 4.4.x before 4.4.4 does not properly restrict input to filter_var FILTER_VALIDATE_EMAIL operations in PHP, which allows remote attackers to cause a denial of service (memory consumption and application crash) via a long e-mail address string, a related issue to CVE-2010-3710.

Unspecified vulnerability in the Extension Manager in TYPO3 4.2.x before 4.2.15, 4.3.x before 4.3.7, and 4.4.x before 4.4.4 allows remote authenticated administrators to read and possibly modify arbitrary files via a crafted parameter, a different vulnerability than CVE-2010-3714.