Research Plan: CVE-2025-66080 - Missing Authorization in Cookie Notice for GDPR, CCPA & ePrivacy Consent

1. Vulnerability Summary

The Cookie Notice for GDPR, CCPA & ePrivacy Consent plugin (versions <= 4.0.3) is vulnerable to unauthorized data modification due to a missing capability check in the wpl_data_req_process_delete() function. This function is responsible for processing the deletion of data requests (likely GDPR erasure requests). Because it fails to verify that the requester has administrative privileges or that the request is legitimate via nonces, an unauthenticated attacker can trigger the deletion of stored data.

2. Attack Vector Analysis

• Vulnerable Function: wpl_data_req_process_delete()
• Entry Point: Likely an AJAX action or an admin_init hook. Given the "unauthenticated" description, it is either registered via wp_ajax_nopriv_ or triggered during admin_init (which runs for all users, including unauthenticated ones, when accessing /wp-admin/admin-ajax.php).
• Required Parameters (Inferred):
  • action: The AJAX action name (likely wpl_data_req_process_delete or similar).
  • id or request_id: The ID of the data request to be deleted.
• Authentication: None (Unauthenticated).
• Preconditions: There must be existing data requests or records in the plugin's database tables for the deletion to have a visible effect.

3. Code Flow (Inferred)

1. Request Initiation: An HTTP request is sent to /wp-admin/admin-ajax.php.
2. Hook Execution: WordPress triggers admin_init or the registered wp_ajax_ / wp_ajax_nopriv_ action.
3. Function Call: The plugin's logic routes the request to wpl_data_req_process_delete().
4. Vulnerability Point: Inside wpl_data_req_process_delete(), the code likely retrieves a record ID from $_GET or $_POST and proceeds to call a deletion method (e.g., $wpdb->delete(...)) without:
   • Calling current_user_can( 'manage_options' ).
   • Verifying a nonce using check_admin_referer() or wp_verify_nonce().
5. Sink: The database record is removed.

4. Nonce Acquisition Strategy

According to the vulnerability description, the primary issue is Missing Authorization. This often implies that even if a nonce is present, the function fails to check the user's capability. However, if the function is unauthenticated and uses a nonce, we must find where it's leaked.

1. Identify Shortcodes: Check if the plugin uses shortcodes to display data request forms.
   • grep -rn "add_shortcode" .
2. Create Test Page:
   • wp post create --post_type=page --post_status=publish --post_title="GDPR Request" --post_content='[shortcode_found]'
3. Extract Nonce (if needed):
   • Navigate to the page and use browser_eval to look for localized script data:
   • browser_eval("window.wpl_cookie_consent_data?.nonce") (Inferred JS variable name).

Note: If the function is hooked to admin_init and lacks any check_admin_referer, no nonce is required.

5. Exploitation Strategy

The goal is to delete a data request record unauthentically.

1. Target URL: http://localhost:8080/wp-admin/admin-ajax.php (or via admin_init on any admin page).
2. Method: POST or GET (depending on how the plugin reads parameters).
3. Payload (Inferred):

   POST /wp-admin/admin-ajax.php HTTP/1.1
   Content-Type: application/x-www-form-urlencoded
   
   action=wpl_data_req_process_delete&id=1
   

4. Step-by-Step:
   • Identify the correct action name and parameter name (e.g., id, request_id, delete_id).
   • Identify if the trigger is an AJAX action or an admin_init listener looking for specific $_GET parameters.
   • Send the request using the http_request tool.

6. Test Data Setup

1. Enable Data Requests: Ensure the plugin's GDPR/CCPA request feature is active in the settings.
2. Generate a Request: As a visitor (unauthenticated), submit a "Data Deletion Request" through the plugin's frontend form (often found on a Privacy Policy page or via a shortcode).
3. Confirm Request Exists:
   • wp db query "SELECT * FROM wp_posts WHERE post_type='cli_data_request'" (Post type is an inference based on typical plugin naming).
   • Alternatively, check plugin-specific tables: wp db query "SHOW TABLES LIKE '%wpl_%'" followed by a SELECT on likely tables.

7. Expected Results

• Response: The server should return a success message (e.g., 1, {"success":true}, or a redirect) even when the requester is not logged in.
• Impact: The targeted data request record is permanently removed from the database.

8. Verification Steps

1. Check Database: Run the same SQL query used in "Test Data Setup" to verify the record with the targeted ID no longer exists.
   • wp db query "SELECT count(*) FROM [TABLE_NAME] WHERE id=1"
2. Admin UI Check: Log in as an administrator and navigate to the "Data Requests" or "Cookie Law Info" section to verify the request is gone from the management dashboard.

9. Alternative Approaches

• Parameter Fuzzing: If id does not work, try request_id, record_id, or cli_id.
• Method Swap: If POST fails, try the request as a GET request to /wp-admin/admin-ajax.php?action=wpl_data_req_process_delete&id=1.
• Bulk Deletion: Check if the function accepts an array of IDs (e.g., id[]=1&id[]=2) for mass data deletion.