mastercal.unomaha.edu XSS vulnerability

Vulnerable URL: http://mastercal.unomaha.edu/MasterCalendar/MasterCalendar.aspx?data=f1bM4GJyEC6oti5fmkiIYd4GoE3dmtDEChlL1b7C+7sjCK7EMJeNz0uXVzcXuRpkZEmhsd8MpD6khVlFNEtlwYinQcmMCfFFYnq4pCXO1pFKz+RSWknWl0O2Nlnr0NNiGD4EK2OdxlJPyodWiULWDJWnCFYDW0rUMsaf9KaAGzOS8yMF2f8pgZsfKV52jNTKQZrZXx59m+g= Details...