Cybercriminals have been abusing a payment module to steal credit card data from online shops powered by the Magento ecommerce platform, web security firm Sucuri reported on Friday.

The targeted module is the Realex Payments Magento extension (SF9), which integrates with the Realex Realauth Remote payment gateway. The Realex Payments extension allows Magento store owners to process mail and telephone orders by entering the payment details themselves.