Explore the intricacies of Cross-Origin Resource Sharing (CORS) in this 42-minute conference talk from Circle City Con 2019. Delve into REST authentication, cross-origin requests, and CORS request headers for pre-flight. Learn about CORS pre-flight response headers, methods for bypassing CORS, and common pitfalls encountered by testers. Examine a multi-step CORS exploit example and discover effective CORS defenses. Investigate the role of authorization headers in security and gain valuable insights from a comprehensive summary and additional resources provided.