Open-xchange OX App Suite is a web-based cloud desktop environment from Open-Xchange (Open-xchange), a US-based company. The environment allows users to more intuitively manage email, tasks, files, etc. A cross-site scripting vulnerability exists in Open-xchange OX App Suite 7.10.4 and prior versions, which can be exploited by attackers to allow XSS via a crafted distribution list that is incorrectly handled in the scheduling view.