On January 12, 2023, WooCommerce.com notified about an unauthorized breach of Mailchimp, a communications tool WooCommerce uses to send emails to customers who have opted in. The recent security incident has impacted more than 130 plus different accounts including WooCommerce.com
This breach may have resulted in some of the information that might exposed at Mailchimp includes your name, store URL, and email address. However, No payment data, passwords, or other sensitive security information is part of this breach.
This was not a breach of WordPress.com or WooCommerce.com
Your store and customer data have not been impacted by this incident, nor have your WordPress.com or WooCommerce.com accounts.
For further details, refer unauthorized breach of Mailchimp