The WSTG v5 is the latest stable release (as of 2025) of the industry standard for web application penetration testing. It provides a framework of over 90 test cases across 12 chapters, covering everything from information gathering to API testing. Unlike its predecessor (v4), v5 has been updated for modern architectures: Single Page Apps (SPA), GraphQL, JWT, OAuth 2.0, and cloud-native headers .