SQL injection vulnerability in home/seos/courier/security_key2.api on the Accellion File Transfer Appliance (FTA) before FTA_9_12_40 allows remote attackers to execute arbitrary SQL commands via the client_id parameter.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-3435
http://www.kb.cert.org/vuls/id/505560
http://devco.re/blog/2016/04/21/how-I-hacked-facebook-and-found-someones-backdoor-script-eng-ver/