In summary, authentication bypass is a crucial area of focus during a penetration test, as it can significantly impact the security of an application. Through this article, we have explored four key areas that should be examined when testing authentication: forced browsing, parameter modification, session identifier prediction, and SQL injection within login forms. By understanding these common pitfalls and learning how to exploit them, testers can gain valuable insights into the weaknesses of an application's authentication mechanism. The use of tools such as Burp, wfuzz, and Python can greatly aid in the exploration of these issues, making it easier to identify potential vulnerabilities and report them effectively.