Hackers target 500 stores using Magento 1 e-commerce platform. Hackers used a combination of an SQL injection and PHP Object Injection attack to gain control of the Magento store. Adobe has urged customers to upgrade to the newer Magento platform. Magecart Group 12, known for skimming payment cards, is using an updated attack technique to gain remote administrative access to sites that run an older version of Adobe’s Magento software (see: Magecart Skimming Tactics Evolve)”]
Source: https://www.cuinfosecurity.com/massive-breach-hits-500-e-commerce-sites-a-18492