backup-database.php in TorrentTrader Classic 1.09 does not require administrative authentication, which allows remote attackers to create and download a backup database by making a direct request and then retrieving a .gz file from backups/.
https://www.exploit-db.com/exploits/8958
https://exchange.xforce.ibmcloud.com/vulnerabilities/51147
http://www.securityfocus.com/archive/1/504294/100/0/threaded