Hi, in this tutorial of Extreme Vulnerable Node Application (XVNA) we show the Broken Authentication vulnerability where we could access the application without having any credentials and could also use its REST call without any authentication. This is a huge vulnerability in XVNA.
We could crack the application in the following manner, see the video for more details.
Extreme Vulnerable Node Application is available at Github https://github.com/vegabird/xvna and you can download it and test in your localhost.
For Broken Authentication, we need to check the user authentication on each and every page visit and need maintain the session for it.