To recap, it all comes down to basic training and understanding on the AWS platform. And this is not limited to S3. In some cases, there’s public access to services because AWS networking, firewall and access management concepts are not understood correctly. It might be that you don’t have proper authentication settings in place in the actual AWS accounts. Or it might be just that general security principles like proper patching plan are not followed. 

There’s a lot to learn when starting a cloud journey and a proper cloud foundation must be built for networking and security together with educating people on how to use the services. Luckily, we are here to help you out with all of that!