If you find an admin page you did not create (e.g., /old-backend ), investigate immediately. It could be a leftover backdoor. Part 6: The Dark Side – How Hackers Abuse Admin Login Page Finders Understanding the attack vector helps you defend against it.
Gobuster or ffuf with a large thread count (e.g., -t 200 ) on a fast connection.
Stay secure, stay ethical, and always get permission first.