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.