A reflected XSS vulnerability exists in REDCap before 12.04.18 in the Alerts & Notifications upload feature. A crafted CSV file will, when uploaded, trigger arbitrary JavaScript code execution.
A stored Cross-Site Scripting (XSS) vulnerability in the Missing Data Codes functionality of REDCap before 11.4.0 allows remote attackers to execute JavaScript code in the client's browser by storing said code as a Missing Data Code value. This can then be leveraged to execute a Cross-Site Request Forgery attack to escalate privileges to administrator.