Multiple cross-site scripting (XSS) vulnerabilities in WinWebMail Server 3.8.1.6 allow remote attackers to inject arbitrary web script or HTML via an e-mail message body with (1) a SCRIPT element, (2) a crafted Cascading Style Sheets (CSS) expression property, (3) a CSS expression property in the STYLE attribute of an arbitrary element, (4) a crafted SRC attribute of an IFRAME element, or (5) UTF-7 text in an HTTP-EQUIV="CONTENT-TYPE" META element.