Directory traversal vulnerability in admin/defaults.php in PHPlist 2.10.1 and earlier allows remote attackers to access arbitrary files via a .. (dot dot) in the selected%5B%5D parameter in an HTTP POST request.
http://www.vupen.com/english/advisories/2005/2345
http://www.securityfocus.com/bid/15350
http://www.securityfocus.com/archive/1/416005/30/0/threaded