Exploitation Research Plan - CVE-2026-25426

1. Vulnerability Summary

The E-cab Taxi Booking Manager for Woocommerce plugin (versions <= 2.0.1) contains a missing authorization vulnerability. Specifically, one or more AJAX handlers registered via wp_ajax_nopriv_* or wp_ajax_* hooks fail to implement current_user_can() checks. This allow unauthenticated or low-privileged users to execute functions intended for administrators, such as modifying plugin settings or booking data.

2. Attack Vector Analysis

• Endpoint: /wp-admin/admin-ajax.php
• Method: POST
• Action: To be confirmed via grep, but likely related to settings updates (e.g., ecab_save_settings, ecab_update_options, or save_ecab_admin_data).
• Authentication: Unauthenticated (PR:N) as indicated by the CVSS vector. This implies the use of wp_ajax_nopriv_ hooks.
• Preconditions: The plugin must be active. A valid WordPress nonce may be required if check_ajax_referer is present, even if authorization is missing.

3. Code Flow

1. Registration: The plugin registers AJAX actions in its main class or an AJAX handler class (likely includes/class-ecab-taxi-booking-manager.php or a dedicated AJAX file).
   • Code Trace: add_action('wp_ajax_nopriv_[ACTION_NAME]', 'callback_function');
2. Execution: When a POST request is sent to admin-ajax.php with action=[ACTION_NAME], WordPress executes the callback.
3. Vulnerability: The callback function performs sensitive operations (like update_option or database writes) but only checks for a nonce (CSRF protection) without checking if the user has the manage_options capability.

4. Nonce Acquisition Strategy

If the vulnerable function uses check_ajax_referer('ecab_nonce_action', 'security'), we must retrieve the nonce from the frontend.

1. Identify Script Localization: Search for wp_localize_script in the codebase to find the object name and key.
   • Grep: grep -rn "wp_localize_script" .
2. Identify Triggering Page: Find where the script is enqueued (e.g., a page containing the taxi booking shortcode).
   • Grep: grep -rn "add_shortcode" . (Look for something like [ecab_booking_form]).
3. Extraction:
   • Create a page with the identified shortcode: wp post create --post_type=page --post_status=publish --post_content='[SHORTCODE_NAME]'
   • Use browser_navigate to visit that page.
   • Use browser_eval to extract the nonce: browser_eval("window.ecab_obj?.nonce") (Replace ecab_obj and nonce with actual keys found in step 1).

5. Exploitation Strategy

Step 1: Identification (Reconnaissance)

Find the vulnerable AJAX action and the settings it can modify.

# Find all nopriv AJAX actions
grep -r "wp_ajax_nopriv_" .

# Examine the callback for the absence of current_user_can()
# Example: If action is 'ecab_save_settings', find the function
grep -rn "function ecab_save_settings" .

Step 2: Payload Construction

Construct a POST request to modify a setting. A common target for "Integrity: Low" is changing a price multiplier or an administrative email.

• URL: http://vulnerable-wp.local/wp-admin/admin-ajax.php
• Content-Type: application/x-www-form-urlencoded
• Body: action=[VULNERABLE_ACTION]&security=[NONCE]&[SETTING_KEY]=[MALICIOUS_VALUE]

Step 3: Execution

Use the http_request tool to send the payload.

6. Test Data Setup

1. Install Plugin: Ensure ecab-taxi-booking-manager version 2.0.1 is installed and active.
2. Create Nonce Page:

   # Inferred shortcode based on plugin name
   wp post create --post_type=page --post_title="Booking" --post_status=publish --post_content='[ecab-taxi-booking]'
   

7. Expected Results

• Success: The server returns a success code (e.g., 1, {"success":true}, or a redirect).
• Verification: The targeted setting in the wp_options table or the plugin dashboard is updated to the malicious value.

8. Verification Steps

After the exploit, use WP-CLI to confirm the state change:

# Check if the plugin option was updated
wp option get [OPTION_NAME_FROM_CODE]

# Example if the vuln modifies a specific booking (ID 123)
wp db query "SELECT * FROM wp_posts WHERE ID = 123"

9. Alternative Approaches

If no wp_ajax_nopriv_ hooks are found:

1. Subscriber-Level Access: Check wp_ajax_ (authenticated) hooks. If current_user_can is missing, even a 'Subscriber' can exploit it.
   • Create a subscriber: wp user create attacker attacker@example.com --role=subscriber
   • Log in and extract the nonce from the user profile or dashboard.
2. REST API: Check for register_rest_route calls where the permission_callback returns __return_true or is missing entirely.
   • Grep: grep -rn "register_rest_route" . -A 5