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Magento 2.4.6 security issues? Credit card fields added into checkout / payment module

We have a magento 2.4.6 and we are using the PAYPLUG payment module during checkout.
It is configured so none datas about credit cards are asked on our own website BUT a popup opens leading customer to payplug website, where the payment actually occurs.

Today i noticed that ‘credit cxard’ input fields are added to the payment choice, below credit card module of payplug.
Those fields are not part of payplug module.
But i can’t find which fiel or code was modified. I don’t find anything specific…

Below my printscreen, everything in blue should not be there:
enter image description here

and when i check the code, i can find this:
enter image description here

Any idea? I already checked app/code or /vendor for the code found, but can’t find anything specific…