I hope someone can help.
Running Magento 18.104.22.168, website. When a customer click at checkout page sudden there is a strange customer information and payment information popup.But I don't find this file in cpanel file manager.
Any ideas what this might be and how I can fix it?
Thank you in advance to anyone who can help.
Would you be able to share a screenshot of the popup please?
If you think there has been an incident, this a great template to follow on what to do next: https://github.com/talesh/response
On a more practical basis, you will want to validate that the pop-up form is indeed malicious in which case ideally you're going to want to: