Multiple directory traversal vulnerabilities in (1) compose.php and (2) libs/Atmail/SendMsg.php in @Mail WebMail Client in AtMail Open-Source before 1.05 allow remote attackers to read arbitrary files via a .. (dot dot) in the Attachment[] parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/74504
http://www.kb.cert.org/vuls/id/743555
http://secunia.com/advisories/47012