Cross-site scripting (XSS) vulnerability in fe_adminlib.inc in TYPO3 4.0.x before 4.0.9 4.1.x before 4.1.7 and 4.2.x before 4.2.1 as used in extensions such as (1) direct_mail_subscription (2) feuser_admin and (3) kb_md5fepw allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.