What is the best mitigation approach for a company's website susceptible to various attack vectors?

The best mitigation approach for a company's website that is susceptible to various attack vectors is attack surface reduction. This strategy focuses on minimizing the number of potential entry points that malicious actors can exploit. By reducing the attack surface, you effectively limit the opportunities for attackers to target your website through vulnerabilities in the application, network, or infrastructure.

Implementing effective attack surface reduction involves various techniques such as eliminating unnecessary services, removing outdated software, applying least privilege access controls, and keeping the application's components updated. This proactive approach not only decreases the likelihood of a successful attack but also enhances the overall security posture of the website.

While other options like input validation, output encoding, and threat modeling are important components of a comprehensive security strategy, they focus on specific aspects of security. Input validation ensures only properly formatted data is accepted, output encoding helps prevent cross-site scripting (XSS) by escaping special characters, and threat modeling assesses potential threats to understand and prioritize security measures. Each of these techniques is valuable, but they do not address the broader context of reducing the overall attack surface as effectively as the attack surface reduction strategy does.