Unrestricted file upload vulnerability in Link Request Contact Form 3.4 allows remote attackers to execute arbitrary PHP code by uploading a file with a .php extension and an image content type, as demonstrated by image/jpeg.
https://www.exploit-db.com/exploits/4059
https://exchange.xforce.ibmcloud.com/vulnerabilities/34801
http://www.vupen.com/english/advisories/2007/2143
http://secunia.com/advisories/25614
http://corryl.altervista.org/index.php?mod=Download/Exploit#exploit-LRCF-v3.4.rar