Unrestricted file upload vulnerability in signup.php in e107 0.7.8 and earlier, when photograph upload is enabled, allows remote attackers to upload and execute arbitrary PHP code via a filename with a double extension such as .php.jpg.
https://www.exploit-db.com/exploits/4099
https://exchange.xforce.ibmcloud.com/vulnerabilities/35022
http://www.securityfocus.com/bid/24609