Adobe and payment-card companies are making last-minute pleas for e-commerce sites to update to Magento 2. After June 30 (Tuesday of this week), Adobe is pulling the plug on security fixes for Magento Commerce 1.14 and Magento Open Source 1 (formerly known as Enterprise Edition and Community Edition) E-commerce merchants must migrate to Magento 2, which was released five years ago. The Magecart cybergang, which has previously targeted the platform in order to inject card-skimming scripts onto checkout pages, is the biggest concern for security researchers.
Source: https://threatpost.com/tuesdays-magento-1-eol-100k-online-stores/157000/