Multiple cross-site scripting (XSS) vulnerabilities in Open-Xchange Server before 6.20.7 rev14 6.22.0 before rev13 and 6.22.1 before rev14 allow remote attackers to inject arbitrary web script or HTML via (1) invalid JSON data in a mail-sending POST request (2) an arbitrary parameter to servlet/TestServlet (3) a javascript: URL in a standalone-mode action to a UWA module (4) an infostore attachment (5) JavaScript code in a contact image (6) an RSS feed or (7) a signature.