The Patient Portal of OpenEMR 5.0.2.1 is affected by a Command Injection vulnerability in /interface/main/backup.php. To exploit the vulnerability, an authenticated attacker can send a POST request that executes arbitrary OS commands via shell metacharacters.

A Stored XSS vulnerability in interface/usergroup/usergroupadmin.php in OpenEMR before 5.0.2.1 allows a admin authenticated user to inject arbitrary web script or HTML via the lname parameter.

A SQL injection vulnerability exists (with user privileges) in library/customtemplate/ajaxcode.php in OpenEMR 5.0.2.1.

A SQL injection vulnerability exists (with user privileges) in interface/forms/eyemag/save.php in OpenEMR 5.0.2.1.

The Patient Portal of OpenEMR 5.0.2.1 is affected by a incorrect access control system in portal/patient/machineconfig.php. To exploit the vulnerability, an unauthenticated attacker can register an account, bypassing the permission check of this portal's API. Then, the attacker can then manipulate and read data of every registered patient.