Multiple unrestricted file upload vulnerabilities in (1) back/upload_img.php and (2) admin/upload_img.php in Walter Beschmout PhpQuiz 1.2 and earlier allow remote attackers to upload arbitrary PHP code to the phpquiz/img_quiz folder via the (a) upload, (b) ok_update, (c) image, and (d) path parameters, possibly requiring directory traversal sequences in the path parameter.
https://www.exploit-db.com/exploits/2376
https://exchange.xforce.ibmcloud.com/vulnerabilities/28995
http://www.vupen.com/english/advisories/2006/3693
http://www.securityfocus.com/bid/20065
http://www.securityfocus.com/archive/1/446315/100/0/threaded