Client-Side Injected Malware (CSIM) includes unauthorized widgets (product recommendations and deals), advertisements and spyware scripts that are injected into websites by extensions installed on browsers, or by malware downloaded unintentionally to the visitor’s computers, tablets and mobile devices. Prevalent in all browsers and operating systems, these injections cause visitors to view a webpage in an entirely different way than the page was designed to display, without permission from or payment to the website owner. The programs that cause injections are usually bundled within software the wanted to download (e.g., a free PDF viewer or – as ironic as it may seem – an anti-virus program) or added via updates to other programs already installed on their computer without the visitor’s knowledge or consent.