Final answer:
This question is about a client-side XSS attack, where an attacker exploits weaknesses in an outdated web browser. To mitigate the risk, regularly update web browsers to the latest versions.
Step-by-step explanation:
This question is about a client-side XSS attack. XSS stands for Cross-Site Scripting, which is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by users. In this case, the attacker takes advantage of weaknesses in the victim's web browser, with outdated browsers being particularly susceptible. For example, let's say a user visits a website that is vulnerable to XSS attacks. The attacker could exploit this vulnerability by injecting a malicious script into the website's code, which will then be executed by the victim's browser when they visit the compromised page.
This can lead to unauthorized access to sensitive information or the ability to perform unwanted actions on behalf of the victim. To mitigate the risk of client-side XSS attacks, it is important to regularly update web browsers to the latest versions, as newer versions often contain security patches and fixes for known vulnerabilities.