In the largest automated hacking campaign against Magento sites, attackers compromised almost 2,000 online stores this weekend to steal credit cards. Magento is a popular eCommerce platform that allows web sites to quickly create an online store to sell their products and accept cards. The majority of the hacked stores were Magento version 1, which no longer receives security updates since June 2020. VISA issued an advisory urging merchants to migrate e-commerce sites to the more secure Magento 2.x. The attack started Friday with ten stores infected with a credit card skimming script not previously seen in other attacks.
Source: https://www.bleepingcomputer.com/news/security/magento-stores-hit-by-largest-automated-hacking-attack-since-2015/