Cross-Site Scripting Definition:
Cross-Site Scripting (XSS) is a type of security Vulnerability found in web applications that lets attackers inject malicious scripts into web pages viewed by other users.
What is Cross-Site Scripting?
XSS happens when a website doesn’t properly check user input, allowing attackers to sneak in harmful scripts. These scripts then run on the web app as part of the system and wait users visit the page. Their browser runs the script, potentially stealing their data or taking control of their account.
Why is Cross-Site Scripting important?
XSS can lead to serious problems, like stolen login details, leaked personal info, or even full account takeovers. It’s one of the most common vulnerabilities and can affect any website if not properly protected.
How does Cross-Site Scripting work?
Attackers inject malicious scripts through input fields or URLs. The script then runs on the web page without the user knowing. To stop this, developers need to properly validate and escape user input.
Cross-Site Scripting Examples:
A common example is an attacker putting a script into a comment box on a website. When other users read the comments, the script runs in their browser and might send their cookies (and login session) to the attacker.
Cross-Site Scripting Issues:
The main challenge with XSS is that it’s easy to overlook when developing websites. It is crucial to make sure all user input is sanitised before it’s displayed on the page.
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