What does the abbreviation XSS stand for in web security?

What does the abbreviation XSS stand for in web security?

• A. Cross Site Scripting
• B. Cross Script Security
• C. XML Security Standards
• D. X-Server Scripting

Answer: (A)

XSS stands for Cross-Site Scripting. It’s a web security vulnerability where an attacker injects malicious scripts into content that other users will view, taking advantage of the browser executing code from a trusted site. The acronym directly reflects this term, which is why this choice is the best fit. The other options describe concepts that aren’t used to name this vulnerability—Cross Script Security isn’t the standard term, XML Security Standards refers to something different, and X-Server Scripting isn’t a recognized web security concept. Thinking about XSS helps you see why input validation, output encoding, and security policies like Content Security Policy are important, since preventing untrusted input from being executed in a user’s browser blocks these scripts from running.

XSS stands for Cross-Site Scripting. It’s a web security vulnerability where an attacker injects malicious scripts into content that other users will view, taking advantage of the browser executing code from a trusted site. The acronym directly reflects this term, which is why this choice is the best fit. The other options describe concepts that aren’t used to name this vulnerability—Cross Script Security isn’t the standard term, XML Security Standards refers to something different, and X-Server Scripting isn’t a recognized web security concept. Thinking about XSS helps you see why input validation, output encoding, and security policies like Content Security Policy are important, since preventing untrusted input from being executed in a user’s browser blocks these scripts from running.