"Our boss suggested introducing a standard which allows websites to do something. But I don't remember what to do...". We should find "a standard which allows websites to do something". But what is something? Google: "a standard which allows websites to do something". The first link is https://securitytxt.org. Maybe Überbank also have this file? Navigate to http://ctf.knastu.ru/webch/security.txt. And read flag ;) HumanCTF{f0und_vuln_3xp3c73d_flag}