Description: The delivery of XSS (Cross-Site Scripting) payload refers to the method by which an attacker injects malicious code into a web application, with the aim of having this code executed in the browser of an unsuspecting user. This type of attack relies on exploiting vulnerabilities in input validation, allowing the attacker to send scripts that can steal sensitive information, such as session cookies, or redirect users to malicious sites. The payload can take the form of JavaScript, HTML, or any other type of code that the browser can interpret. The delivery of the payload can occur through various vectors, such as forms, links, or even user-generated content. The effectiveness of this type of attack lies in the trust users place in web applications, making them more susceptible to executing code that appears legitimate. Therefore, the delivery of XSS payload is a critical aspect of web security testing, as it allows security testers to identify and mitigate vulnerabilities before they can be exploited by malicious attackers.