If you are testing an ASP.NET WebForms app from 2012 that runs on IE compatibility mode, v4’s test cases for ViewState, postback, and old-school session fixation are actually more applicable. v5 assumes modern frameworks.
: Inclusion of client-side security and more detailed session management rationalization. Which version should you use? owasp testing guide v4 or v5
But here’s the reality:
Have a legacy app that still needs v4? The archive is available, but seriously—consider modernizing. If you are testing an ASP
The following table summarizes the key differences between OWASP Testing Guide v4 and v5: Which version should you use
OWASP Testing Guide v5 represents a significant improvement over v4, reflecting the evolving threat landscape and the need for modern web application security testing techniques. While v4 is still a valuable resource, v5 is the recommended version for organizations and individuals involved in web application security testing. By adopting v5, testers and security professionals can ensure they are using the most up-to-date and effective testing methodologies to identify and exploit vulnerabilities in web applications.
Released originally in 2014, WSTG v4 established a "best practice" penetration testing framework. It broke down testing into 11 key sub-categories, covering everything from information gathering to client-side vulnerabilities. OWASP Web Security Testing Guide