Newly Released CompTIA SY0-701 Exam PDF

Cross-site scripting (XSS) occurs when a web application fails to properly validate or sanitize user input, allowing attackers to inject malicious scripts into web pages viewed by other users. The most effective remediation is input validation, which ensures that only safe, expected data is accepted by the application.

Security+ SY0-701 highlights input validation as a primary defense against:

XSS

SQL injection

Command injection

Path traversal attacks

By validating and sanitizing input at both the client and server layers, organizations can strip harmful characters, block script tags, enforce strict data types, and ensure proper encoding.

A NGFW (B) or WAF (D) can mitigate attacks by blocking malicious payloads, but they do not fix the root cause within the web application. A vulnerability scan (C) identifies the issue but does not remediate it.

Therefore, only input validation (A) directly resolves the underlying coding flaw responsible for XSS.

The scenario describes a situation where a user unknowingly triggers an unwanted action, such as changing their password, by clicking a malicious link. This is indicative of a Cross-Site Request Forgery (CSRF) attack, where an attacker tricks the user into executing actions they did not intend to perform on a web application in which they are authenticated.

References = CompTIA Security+ SY0-701 study materials, particularly in the domain of web application security and common attack vectors like CSRF​​.

Typosquatting is a social engineering and cybersquatting technique in which attackers register domain names similar to legitimate ones, hoping users will make a typographical error and visit their malicious website instead.

Detailed Explanation:Host isolation ensures that a device is separated from the network, preventing it from accessing or being accessed by other network resources. This is typically achieved by quarantining the device. Reference: CompTIA Security+ SY0-701 Study Guide, Domain 4: Security Operations, Section: "Isolation and Containment"​​.