Magecart refers to a collection of cybercriminal groups that target e-commerce websites by injecting malicious JavaScript code into online checkout pages. This code, often called a 'skimmer,' secretly captures customers’ payment card information as it is entered and sends it to attackers. Magecart attacks have compromised many well-known retailers and payment platforms, resulting in significant financial losses and data breaches. These attacks often exploit vulnerabilities in third-party plugins or supply chains, making them difficult to detect and prevent. Businesses and consumers are urged to use robust security measures to guard against Magecart threats.