Path Traversal Path traversal is an attack in which the attacker tries to step out of the permitted directory and reach files the application should never display. The best-known pattern is a sequence such as `../`, which walks the path back up the file system level by level.

SSRF SSRF is a vulnerability in which the attacker gets a web server to send a request to an address of the attacker's choosing. The distinction matters: the request is not sent by the user's browser but by the server. That opens the door to internal services which from the outside ought to remain invisible.