OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, an Insecure Direct Object Reference (IDOR) vulnerability in the fee sheet product save logic (library/FeeSheet.class.php) allows any authenticated user with fee sheet ACL access to delete, modify, or read drug_sales records belonging to arbitrary patients by manipulating the hidden prod[][sale_id] form field. The save() method uses the user-supplied sale_id in five SQL queries (SELECT, UPDATE, DELETE) without verifying that the record belongs to the current patient and encounter. Version 8.0.0.3 contains a patch.