MVC usage in application development

• View layer is considered as the part of the application that has access to the life cycle of the device.
• Model layer is the data part of the application that stores the data. This layer forms the part that does the content of the app.
• Controller layer is the layer responsible for deligating the control from view to model and sending back the response from model to view.
• Vulnerability here involves that too much responsibility is placed on the controller classes. Things involve handling business logic, calling API's and callback and communicating with database.