WSN Forum 1.3.4 and earlier allows remote attackers to execute arbitrary PHP code via a modified pathname in the pathtoconfig parameter that points to an avatar image that contains PHP code, which is then accessed from prestart.php. NOTE: this issue has been labeled remote file inclusion, but that label only applies to the attack, not the underlying vulnerability.
https://www.exploit-db.com/exploits/2583
https://exchange.xforce.ibmcloud.com/vulnerabilities/29635
http://www.vupen.com/english/advisories/2006/4081