tnftpd before 20080929 splits large command strings into multiple commands, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks via unknown vectors, probably involving a crafted ftp:// link to a tnftpd server.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45534
http://secunia.com/advisories/31958
http://freshmeat.net/projects/tnftpd/?branch_id=14355&release_id=285654#