Who are the targets of these attacks?
How does an attack work?
Regulatory and Compliance Issues—Government and industry regulations, such as the Payment Card Industry Data Security Standards (PCI DSS) and the General Data Protection Regulations (GDPR) can subject businesses to lawsuits and fines should business customers be affected by an XSS attack.
Use an advanced, automated Content Security Policy tool: An automated CSP tool can help businesses control their client-side attack surface by deploying and managing Content Security Policies on their web applications. Advanced automated CSP tools identify all your first- and third-party scripts, your digital assets, and the data they can access. The tool then generates appropriate Content Security Policies based on scanned data and anticipated effectiveness. Businesses can fine tune their CSPs at the domain level for easy management, version control, and reporting.
Audit web assets: Inventory your web assets and know the type of data they hold. Look for vulnerable scripts and any signs of manipulation.
Regularly crawl the client side: Regularly conduct deep-dive scans into client-side applications and software to reveal intrusions, behavioral anomalies, and unknown threats.
Block HTML in inputs: By sanitizing user input on the front-end and back-end, malicious code can be blocked from input submission.
Validate form inputs: Limit information that a user enters in a form. For example, require all content to be alphanumeric and block any HTML or tags commonly used in cross-site scripting.
Create safe cookies: Implement cookie rules, such as tying them to a specific IP address, to prevent them from being used in cross-site scripting attacks.