Multiple cross-site scripting (XSS) vulnerabilities in Alt-N MDaemon Free 12.5.4 allow remote attackers to inject arbitrary web script or HTML via an e-mail message body with (1) the Cascading Style Sheets (CSS) expression property in conjunction with a CSS comment within the STYLE attribute of an IMG element, (2) the CSS expression property in conjunction with multiple CSS comments within the STYLE attribute of an arbitrary element, or (3) an innerHTML attribute within an XML document.