Learn the fundamentals of penetration testing using OWASP in this 26-minute video from HackerOne. Explore the OWASP Top 10 categories and vulnerability types, including injection, broken authentication, sensitive data exposure, XML external entities, broken access control, security misconfigurations, cross-site scripting, deserialization issues, components with known vulnerabilities, and insufficient logging and monitoring. Gain insights into the OWASP OAuth Testing Guide and V4 Checklist, and discover how these tools can enhance your hacking skills through the Hacker101 program.