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Pretty frightening, right? Now that we've seen one particular way file uploads can make your site vulnerable, we should learn how to implement this kind of functionality safely.

A hacker
cdn.example.com/1a2fe/hack.php?cmd=cat+/etc/mysql/my.cnf
[client] user=admin password=04bf68c99cf4cc23d034d10a8a612549
          db_name=2479fd9059d6d57dd5521c69dc0ba359 host=ec6-115--153.compute-26.amazonaws.com
          port=2323 [mysql] no-auto-rehash connect_timeout=3