Unrestricted file upload vulnerability in inc/amfphp/administration/banneruploaderscript.php in the WP EasyCart (aka WordPress Shopping Cart) plugin before 3.0.9 allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in products/banners/.
osvdb.org/show/osvdb/116806
packetstormsecurity.com/files/129875/WordPress-Shopping-Cart-3.0.4-Unrestricted-File-Upload.html
security.szurek.pl/wordpress-shopping-cart-304-unrestricted-file-upload.html
www.exploit-db.com/exploits/35730
www.securityfocus.com/bid/71983
wordpress.org/plugins/wp-easycart/changelog/