Cookies

Looking at the website provided, if we try and enter an arbitrary input, it would prompt us that the input is invalid. However, if we use the placeholder text snickerdoodle we see that it gives us a page where the text is set to I love snickerdoodle cookies!.

Method

Looking at the cookie set after entering snickerdoodle we see that it has a value of 0. By testing around and changing the cookie value to 1, 2 etc. we see that it outputs a different name. My guess is that a certain cookie value will return us the flag.

Script

This script uses python requests to loop through 1-20 and set that as our cookie. Then we send the post request and see what it returns. If something unusual(does not contain I love), we found our flag.