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Question:

What is the type of attack Jason performed in the following situation:
Jason, an attacker, targeted a company in order to launch an attack on its Internet-facing web server in order to obtain access to backend systems that are secured by a firewall. In this method, he utilized the URL https://xyz.com/feed.php?url:externaIsile.com/feed/to retrieve a remote feed and changed the URL input to the local host to examine all of the target server's local resources.

A Server-side request forgery (SSRF) attack
Explaination