FAQMasterFlex 1.2 - SQL Injection

Hi guys, I just found a sqli bug on FAQMasterFlex. Since the software used
as one of Fantastico auto-install software package in F.A.Q software
section.
# Author: [cyb3r.anbu]
# Software Link: [http://www.lethalpenguin.net/design/faqmasterflex.php]
# Version: [1.2]
# Tested on: [Ubuntu]

thx:modpr0be,oebaj,bpdp,wamika crew-

Bugs found on faq.php :
--snip--
<p><a href="<?php echo
"$_SERVER[PHP_SELF]?print=true&cat_name=$cat_name&category_id=$category_id"
?>">Print FAQs</a></p>
    <table width="100%" border="0" cellpadding="8" cellspacing="0">
        <?php
                include "faq_config.php";
                $result = mysql_query("SELECT * FROM faqs WHERE category_id
= '$category_id'") or die(mysql_error());
                while ($row = mysql_fetch_array($result)) {
--snip

PoC:
http://victim/FAQMasterFlex/faq.php?print=true&cat_name=cinema&category_id=[validid][SQL
Injection]

thanks for your attention,

regrads,
cyb3r.anbu