From securecoding.com
Cross-site scripting (often shortened to XSS) is a common security vulnerability that is more prevalent in web applications. It’s estimated that more than 60% of web applications are susceptible to XSS attacks, which eventually account for more than 30% of all web application attacks. The popular OWASP Top Ten document even lists XSS flaws as one of the critical threats to web application security.
This article talks about the cross-site scripting attack so that you can be equipped with the necessary knowledge to avoid it and practice secure coding.