Multiple cross-site scripting (XSS) vulnerabilities in MERAK Mail Server 8.2.4r with Icewarp Web Mail 5.5.1, and possibly earlier versions, allow remote attackers to inject arbitrary web script or HTML via the (1) id parameter to blank.html, or the createdataCX parameter to (2) calendar_d.html, (3) calendar_m.html, or (4) calendar_w.html.