Problem: I made a website so now you can log on to! I don’t seem to have the admin password. See if you can’t get to the flag. http://2018shell.picoctf.com:5477 (link)
Solution: You can enter anything as the username and password, but it won’t let you see the flag.
Checking the site cookies you can see there’s cookie named admin set to False. Change that to True and the refresh the page.
Flag: picoCTF{l0g1ns_ar3nt_r34l_aaaaa17a}