Open-Xchange: Stored-XSS with user interaction on [sandbox.open-xchange.com] via inserted link in mail

Hello, I would like to report about Stored-XSS on sandbox.open-xchange.com via inserted link in mail. Steps to Reproduce ---- 1 Login as first user User A and start creating new mail message 2 Click on a insert link button and paste the following text qwe"-alertdocument.domain-" into Url and Plea...