A security flaw has been discovered in yourmaileyes MOOC up to 1.17. This affects the function subreview of the file mooc/controller/MainController.java of the component Submission Handler. Performing manipulation of the argument review results in cross site scripting. The attack can be initiated remotely. The exploit has been released to the public and may be exploited. The project was informed of the problem early through an issue report but has not responded yet.