Ace the CIW Pro Exam 2025 – Go Web Warrior and Take Charge!

Cross-site scripting (XSS) is a significant security risk for web applications because it involves the injection of malicious scripts into content that is viewed by other users. This vulnerability allows attackers to execute scripts in the context of a user's browser, potentially leading to unauthorized access to sensitive information, session hijacking, and a range of other security issues. When a user unwittingly runs such a script, the attacker can manipulate the user's session, impersonate them, or retrieve their personal data, posing a serious threat to both users and the integrity of the web application.

In contrast, the other options, such as low bandwidth usage, high page loading speed, and responsive design techniques, do not directly pose security threats. Low bandwidth usage and high loading speeds are primarily performance aspects of a web application, which can enhance user experience but do not inherently compromise security. Responsive design techniques focus on creating adaptable layouts for various devices and screen sizes, improving accessibility and usability but also lacking direct implications for web security.