Hello Friends,
I’m Rem01x And I’m Currently Preparing For The eWPTX Exam So I Will Be Walking Through All PortSwigger Labs And Make Sure To Make Writeups For All Of Them.
Let’s Start Now.
Assume that we have this website.

Please Notice the submit feedback functionality.

Now, let’s go and try to analysis the code.

Notice That the script is trying to get the return path.
Let’s try to find the Return Path in the main page.

Great let’s try to inject malicious JavaScript code in it.
JavaScript:alert(document.cookie);

now enter.
