CRLF injection vulnerability in lib/session.php in Hastymail 1.5 and earlier before 20061008 allows remote authenticated users to send arbitrary IMAP commands via a CRLF sequence in a mailbox name. NOTE: the attack crosses privilege boundaries if the IMAP server configuration prevents a user from establishing a direct IMAP session.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29407
http://www.vupen.com/english/advisories/2006/3956
http://www.securityfocus.com/bid/20424
http://www.securityfocus.com/archive/1/453417/100/0/threaded