A Stored Cross-Site Scripting (XSS) vulnerability was discovered in Messenger/messenger_ajax.php in REDCap 12.0.11. This issue allows any authenticated user to inject arbitrary code into the messenger title (aka new_title) field when editing an existing conversation. The payload executes in the browser of any conversation participant with the sidebar shown.
https://www.evms.edu/research/resources_services/redcap/redcap_change_log/