AutomatorWP <= 5.8.4 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Disclosure via automatorwp_campaign_monitor_get_lists AJAX Action

The AutomatorWP – Automator plugin for no-code automations, webhooks & custom integrations in WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 5.8.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to retrieve the site's configured Campaign Monitor mailing list catalog, including all list IDs and names, that should be restricted to users with the plugin's manager capability. The required nonce is emitted unconditionally on every WordPress admin page via wp_localize_script, meaning any subscriber visiting /wp-admin/profile.php can obtain it without any elevated access.