shell bypass 403
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Visita virtual</title>
<style>
* { margin: 0; padding: 0; }
body {background-color: #fff; overflow: hidden; }
iframe { border: 0; s}
</style>
</head>
<body>
<div>
<div>
<?php
$referencia = explode('visita-virtual/',$_SERVER['REQUEST_URI']);
?>
<iframe id="frame_visita" class="frame_visita" src="http://www.altamirainmobiliaria.com/vr/<?php echo $referencia[1]; ?>/" style="border: 0; margin: 0; width: 100%; height: 500px;"></iframe>
<div class="row-end"></div>
</div>
</div>
</body>
</html>