In this post, we demonstrated file upload vulnerability and how to exploit it using a vulnerable app called Mutillidae.

Upload forms are common places where attackers try to upload malicious files that execute system command on the target.

Since we are dealing with a vulnerable app, we don’t expect any kind of upload filters so we used the regular php-reverse-shell.
It can be found here

Upload the shell and start a listener on your machine with the below
Nc -lvp 4545
After successfully uploading the shell, we trigger the shell by navigating to its path in the URL

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