AI Workflow Automation <= 1.4.2 - Missing Authorization

Since source files for AI Workflow Automation (lite) <= 1.4.2 were not provided in the prompt, this plan is designed to guide the agent through Discovery followed by Exploitation. The plan uses the description "Missing Authorization" and the plugin's purpose (AI automation) to target likely vulnerable endpoints.

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1. Vulnerability Summary

The AI Workflow Automation plugin fails to implement proper capability checks (authorization) on one or more AJAX or REST API endpoints. This allows an unauthenticated user to trigger actions that should be restricted to administrators, such as executing AI workflows, modifying automation settings, or interacting with external AI APIs using the site's configured credentials.

2. Attack Vector Analysis

• Endpoint: Likely wp-admin/admin-ajax.php (via wp_ajax_nopriv_* hooks) or a REST API route registered via register_rest_route.
• Authentication: Unauthenticated (No privileges required).
• Action: The "unauthorized action" typically involves triggering a workflow, testing an API connection, or saving a configuration.
• Preconditions: The plugin must be active. Some actions may require an API key (e.g., OpenAI) to be already configured in the settings for the exploit to produce a visible side effect.

3. Code Flow (Inferred Discovery Path)

The agent must first identify the specific vulnerable entry point:

1. Entry Point Discovery: The agent will search for wp_ajax_nopriv hooks in the plugin directory.
   • grep -rn "wp_ajax_nopriv" wp-content/plugins/ai-workflow-automation-lite/
2. Capability Check Audit: For every identified handler, the agent will check if current_user_can() is called.
3. Vulnerable Path:
   • Request: POST /wp-admin/admin-ajax.php with action=[vulnerable_action].
   • Sink: A function that performs a sensitive operation (e.g., update_option, wp_remote_post to an AI service, or database modification) without verifying the user's identity.

4. Nonce Acquisition Strategy

If the identified endpoint uses check_ajax_referer or wp_verify_nonce, the agent must find where that nonce is leaked.

1. Identify Nonce Action: Look for the string used in wp_create_nonce or check_ajax_referer within the plugin code.
2. Locate Localization: Search for wp_localize_script to see where the nonce is passed to the frontend.
   • Grep: grep -rn "wp_localize_script" wp-content/plugins/ai-workflow-automation-lite/
3. Create Trigger Page: If the script (and nonce) only loads on specific pages (e.g., where a workflow is displayed), create a post with the plugin's shortcode.
   • Shortcode Discovery: grep -rn "add_shortcode" wp-content/plugins/ai-workflow-automation-lite/
   • Action: wp post create --post_type=page --post_status=publish --post_content='[ai_workflow_shortcode]' (inferred shortcode).
4. Extract via Browser:
   • Navigate to the new page.
   • browser_eval("window.ai_workflow_obj?.nonce") (inferred JS variable).

5. Exploitation Strategy

Based on common vulnerabilities in "Workflow" plugins, we will target two likely scenarios: Unauthorized Workflow Triggering or Settings Modification.

Scenario A: Unauthorized Workflow Execution (Inferred)

1. Identify Action: Assume the action is ai_workflow_execute_step (inferred).
2. Construct Payload:
   • URL: http://localhost:8080/wp-admin/admin-ajax.php
   • Method: POST
   • Body (URL Encoded):

     action=ai_workflow_execute_step&
     workflow_id=1&
     prompt=Say+this+is+a+test&
     nonce=[EXTRACTED_NONCE]
     

3. Execute: Use http_request.

Scenario B: Unauthorized Settings Update (Inferred)

1. Identify Action: Assume the action is ai_workflow_save_settings (inferred).
2. Construct Payload:
   • URL: http://localhost:8080/wp-admin/admin-ajax.php
   • Body (URL Encoded):

     action=ai_workflow_save_settings&
     openai_api_key=MALICIOUS_KEY&
     nonce=[EXTRACTED_NONCE]
     

6. Test Data Setup

1. Install Plugin: Ensure ai-workflow-automation-lite version 1.4.2 is installed.
2. Configure Admin Setting: (Optional) Use WP-CLI to set a dummy API key so the "Missing Authorization" can be tested against a real functional path.
   • wp option update ai_workflow_openai_key "sk-valid-format-dummy-key"
3. Create a Workflow: If the plugin requires an existing workflow to trigger, create one via the admin UI or database.

7. Expected Results

• Success Criteria: The server returns a 200 OK response with a JSON body indicating success (e.g., {"success": true}) despite the request being unauthenticated.
• Side Effects:
  • If Scenario A: The AI service is contacted (check logs) or a result is returned.
  • If Scenario B: The plugin settings in the wp_options table are updated.

8. Verification Steps

1. Check Options: Use WP-CLI to verify if the unauthorized user successfully changed a setting.
   • wp option get ai_workflow_openai_key
2. Check Logs: Examine the plugin's own execution logs if they exist.
   • wp db query "SELECT * FROM wp_posts WHERE post_type='ai_workflow_log' ORDER BY ID DESC LIMIT 1;" (inferred table/post type).

9. Alternative Approaches

• REST API Check: If no wp_ajax_nopriv hooks are found, audit register_rest_route calls. Check if the permission_callback is missing, returns true, or uses a weak check like is_user_logged_in() (which would still be a vulnerability if it allows Contributor to do Admin tasks, but the CVE suggests unauthenticated).
• Init/Admin_Init Hook: Check if the plugin processes $_POST data directly inside a function hooked to init.
  • grep -rn "add_action.*init" wp-content/plugins/ai-workflow-automation-lite/ followed by a search for $_POST or $_REQUEST.