In web security, what does XSS stand for?

XSS stands for Cross-Site Scripting, which is a security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. This attack exploits the trust a user has for a particular site, allowing an attacker to bypass access controls, impersonate users, or hijack session tokens.

Understanding XSS is critical in web security as it can lead to significant data breaches, unauthorized access, and damage to a company’s reputation. By being aware of this vulnerability, security professionals can implement proper filtering and validation techniques to assess input data and respond to potential security threats effectively.

The other options do not accurately describe XSS. For instance, "External-Site Security" and "Cross-Site Security" suggest concepts but do not pertain to the specific technique of injecting scripts, while "Exploitable-Script Security" misrepresents the nature of XSS by implying a focus on secure programming rather than indicating the method of exploitation itself.