Javascript is the programming language used by web developers to make web pages dynamic.
Unfortunately, it can also pose a cyber threat: JavaScript is often used to fingerprint users in order to spy on their web browser preference, which operating system (OS) they’re using, their IP address etc. - with the intention of invading a user's privacy and security. Cyber criminals can exploit JavaScript vulnerabilities to manipulate, modify or steal data, redirect sessions, and more. As a JavaScript file often isn't flagged up as 'harmful', unlike a '.exe' or 'bat', this gives hackers an added advantage.

Some examples of JavaScript criminal activity are:
- JavaScript Skimmers: Hackers inject JavaScript code into an online retailer site or e-commerce web page.
- JavaScript Ransomware: A malicious JavaScript file is attached to an e-mail and, once opened, can execute malware.
- RATs: For example, ViperSoftX is a JavaScript-based Remote Access Trojan (RAT) that targets Windows vulnerabilities in order steal cryptocurrency, such as Ethereum and Bitcoin. This is also an example of the increased sophistication of JavaScript exploits.

How do we protect against Javascript cybersecurity exploits?
More than 90% of webpages use JavaScript, so disabling it isn't really an option.
Using a proxy search platform is one way users can protect themselves - but the best defense against common JavaScript security vulnerabilities is to be aware of them, and implement best practices to avoid vulnerabilities e.g developers employ writing tests to ensure that code behaves as expected, and auditing code in order to detect potential vulnerabilities.

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