Challenge Description:-

Who doesn’t love cookies? Try to figure out the best one.

Points: 40

The Walkthrough: – 

The challenge name is “Cookies” so let’s look at cookies.

The cookie set in name=-1 so let’s try changing it to 1 using Cookie editor Extension or you can also use burpsuit.

(https://addons.mozilla.org/en-US/firefox/addon/cookie-editor/).

There is a change in the page, So we just need to find the right cookie. Using Brute force manually one by one and at I name=18 you will find the flag.

Flag: picoCTF{3v3ry1_l0v3s_c00k135_064663be}