1. The linux’s overlay filesystem seems to be interesting. https://securitylabs.datadoghq.com/articles/overlayfs-cve-2023-0386
  2. API hacking, Hacking APIs: Breaking Web Application Programming Interfaces
  3. XXS and offense and defense, especially the techniques to bypass HttpOnly cookie https://www.shorebreaksecurity.com/blog/xss-exploitation-with-xhr-response-chaining/?form=MG0AV3
  4. Bug bounty, Bug Bounty Bootcamp The Guide to Finding and Reporting Web Vulnerabilities