Directory traversal vulnerability in opt/arkeia/wui/htdocs/index.php in the WD Arkeia virtual appliance (AVA) with firmware before 10.2.9 allows remote attackers to read arbitrary files and execute arbitrary PHP code via a ..././ (dot dot dot slash dot slash) in the lang Cookie parameter, as demonstrated by a request to login/doLogin.
http://www.securityfocus.com/archive/1/531910/100/0/threaded
http://wiki.arkeia.com/index.php/Path_Traversal_Remote_Code_Execution