To answer this question, you need to understand the concept of Cross-Site Scripting (XSS). Cross-Site Scripting is an attack that occurs on web applications.
Let's go through each option to understand why it is correct or incorrect:
Option A) Client (Browser) - This option is correct because Cross-Site Scripting attacks target vulnerabilities in the client-side code (such as JavaScript) running in the user's browser. Attackers inject malicious scripts into websites, and when users visit these websites, the scripts execute on their browsers, allowing the attacker to steal sensitive information or perform unauthorized actions on behalf of the user.
Option B) Database - This option is incorrect because Cross-Site Scripting attacks do not directly target databases. However, if the web application is vulnerable to XSS, attackers can exploit this vulnerability to manipulate database queries and access or modify data stored in the database.
Option C) Web Application - This option is correct because Cross-Site Scripting attacks exploit vulnerabilities in web applications. Attackers inject malicious scripts into the web application's output, and when other users access the web application, these scripts are executed on their browsers.
Option D) Web Server - This option is incorrect because Cross-Site Scripting attacks do not directly target web servers. However, if the web application is vulnerable to XSS, attackers can exploit this vulnerability to access sensitive files or execute arbitrary code on the web server.
The correct answer is Option A) Client (Browser). This option is correct because Cross-Site Scripting attacks target vulnerabilities in the client-side code running in the user's browser, allowing attackers to execute malicious scripts.