: Use the v5.0 (Latest) online version. Because attack vectors evolve daily, the "bleeding-edge" GitHub content is recommended for the most current methodologies. OWASP Web Security Testing Guide
v5 covers what attackers actually target today. owasp testing guide v4 or v5
Your security posture—and your audit compliance—will thank you. : Use the v5
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. v4’s test cases for ViewState
v5 includes a for every test case, including: