File Store PRO 3.2 Multiple Blind SQL Injection Vulnerabilities

if(isset($_GET["folder"]) && $_GET["folder"]!="") {
$folder=$_GET["folder"];
} else {
exit("Bad Request");
}
if(isset($_GET["id"]) && $_GET["id"]!="") {
$id=$_GET["id"];
} else {
exit("Bad Request");
}

// Validate all inputs
// Added by SepedaTua on June 01, 2006 - http://www.sepedatua.info/
/********************** SepedaTua ****************************/

/* Fields:
$folder
$id
*/
$search = array ('@<script[^>]*?>.*?</script>@si',
'@<[\/\!]*?[^<>]*?>@si',
'@([\r\n])[\s] @',
'@&(quot|#34);@i',
'@&(amp|#38);@i',
'@&(lt|#60);@i',
'@&(gt|#62);@i',
'@&(nbsp|#160);@i',
'@&(iexcl|#161);@i',
'@&(cent|#162);@i',
'@&(pound|#163);@i',
'@&(copy|#169);@i',
'@&#(\d );@e');

$replace = array ('',
'',
'\1',
'"',
'&',
'<',
'>',
' ',
chr(161),
chr(162),
chr(163),
chr(169),
'chr(\1)');

$ffolder = $folder;
$fid = $id;

$folder = preg_replace($search, $replace, $folder);
$id = preg_replace($search, $replace, $id);

-----

$SQL="SELECT `".DB_PREFIX."users`.*, `".DB_PREFIX."file_list`.`filename`, `".DB_PREFIX."file_list`.`descript` ";
$SQL.=" FROM `".DB_PREFIX."file_list` LEFT JOIN `".DB_PREFIX."users` ON `".DB_PREFIX."file_list`.`user_id`=`".DB_PREFIX."users`.`id`";
$SQL.=" WHERE `".DB_PREFIX."file_list`.`id`='".$id."'";
if(!$mysql->query($SQL))
{
exit($mysql->error);
}
if($mysql->num<=0)
{
exit("Record not found");
}

if(!isset($_GET["sig"])) // direct download, no need to login
$MustLogin=1|2|4;
require_once("libs/header.php");
if(!isset($_GET["sig"])) // direct download, no need to login
$userlevel=$CurUser->getlevel();
$SQL="SELECT * FROM `".DB_PREFIX."file_list` WHERE `id`='".$fileid."'";
if(!$mysql->query($SQL))
{
exit($mysql->error);
}