Multiple cross-site scripting (XSS) vulnerabilities in the web client interface in Ipswitch IMail Server 12.3 and 12.4, possibly before 12.4.1.15, allow remote attackers to inject arbitrary web script or HTML via (1) the Name field in an add new contact action in the Contacts section or unspecified vectors in (2) an Add Group task in the Contacts section, (3) an add new event action in the Calendar section, or (4) the Task section.