Login as admin Navigate to Site Admin >> Development >> Experimental settings Tick the Enable communication subsystem checkbox Navigate to Site Admin >> Plugins >> Communication >> Manage communication providers Ensure the Matrix is enabled Create a new course Click the More menu on the course home page and then the Communication link. Select "Matrix" in the Communication service selection box. Verify you will see two new inputs: Room name and Room topic Specify the Room name with: ABC<script>alert('roomname');</script>DEF Specify the Room topic with: ABC<script>alert('roomtopic');</script>DEF Click the Save Changes button Click the More menu on the course home page and then the Communication link. Verify that the Room name is: ABCalert('roomname');DEF Verify that the Room topic is: ABCalert('roomtopic');DEF