Adminer script before 4.6.3 contains file disclosure vulnerability. Exploitation happens in three stages. First, the attacker needs a modified MySQL server, which is altered to send out data import requests to any client that connects. Second, an attacker needs to find an open "adminer.php" on the victim system. Third, as the attacker now has the master password for the victim site, he can use the same Adminer to access the database of the victim. And continue to steal private data or inject a skimmer.