Directory traversal vulnerability in index.php in My Simple Forum 3.0 and 4.1, when magic_quotes_gpc is disabled, allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the action parameter.
https://www.exploit-db.com/exploits/7342
https://exchange.xforce.ibmcloud.com/vulnerabilities/47097
http://www.securityfocus.com/bid/32643
http://securityreason.com/securityalert/4765