XSS (Cross-Site Scripting)

Cross-Site Scripting (XSS) is a security vulnerability found in web applications that allows attackers to inject malicious scripts into webpages viewed by others. When users visit an affected page, the harmful script can execute in their browser, potentially stealing sensitive information like passwords or personal data, or manipulating the page's content. This usually happens when a website does not properly validate or sanitize user input. Protecting against XSS requires developers to ensure that user-provided data is handled safely, preventing the execution of unwanted scripts.