Directory traversal vulnerability in index.php in FreeWebshop 2.2.1 and earlier allows remote attackers to read arbitrary files and disclose the installation path via a .. (dot dot) in the action parameter.
https://www.exploit-db.com/exploits/2704
https://exchange.xforce.ibmcloud.com/vulnerabilities/29991
http://www.vupen.com/english/advisories/2006/4332