There are hundreds of attack techniques that we have not covered here, and the list keeps growing every day as new attacks are found. It is important to keep ourselves aware of them.
Django's official blog (https://www.djangoproject.com/weblog/) is a great place to find out about the latest exploits that have been discovered. Django maintainers proactively try to resolve them by releasing security releases. It is highly recommended that you install them as quickly as possible since they usually need very little or no changes to your source code.
The security of your application is only as strong as its weakest link. Even if your Django code might be completely secure, there are so many layers and components ...