help ULOKI USERCP.PHP HELP

[c3css]

HOW TO FIX THIS ULOKI USERCP.PHP BUG??
HELP ME...
xSS Vuln Page

Vuln C0de (usercp.php)
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$checke=$db->count_rows("SELECT email FROM b_users WHERE email='$email' AND userid='$user->userid'");
if($checke > 0)
{
print "</td></tr></table>";
$db->update_data("UPDATE b_users SET mb='$mb', location='$loc' WHERE userid='$user->userid'");
err_msg("User CP","Your information has been updated.");
}