Whenever I’m dealing with an Access Control challenge, I first go into recon mode. I don’t start guessing vulnerabilities right away. Instead, I follow a simple checklist of places that commonly leak sensitive information.

  • robots.txt
  • sitemap.xml
  • Common admin endpoints
  • JavaScript files
  • Hidden links in the application

The first thing I checked was robots.txt, and it revealed the admin panel.
and we get this :

User-agent: *
Disallow: /administrator-panel

done. go to the /administrator-panel and delete carlos.