Chapter-21, LEC-6 | Cross Site Scripting Outro | #ethicalhacking #cybersport #education

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Cross-site scripting (XSS) is a type of security vulnerability in web applications that allows attackers to inject malicious code into a legitimate website, which can then execute on the user's computer or device when they visit the site. XSS attacks can be classified into two main types: Reflected XSS and Stored XSS.

Reflected XSS involves an attacker injecting malicious code into a web page that is then reflected back to the user through a search query or other user input field. The attacker typically exploits vulnerabilities in the web application's input validation or output encoding to execute their malicious script.

Stored XSS, on the other hand, involves an attacker injecting a malicious script into a web application that is then stored on the server and executed whenever the page containing the script is accessed. This type of XSS is more dangerous than Reflected XSS because the script can be executed multiple times and can affect many users.

To prevent XSS attacks, web developers must properly sanitize and validate user input to prevent the injection of malicious scripts into the application's database. Additionally, web applications should implement measures such as Content Security Policy (CSP) to restrict the execution of scripts and regularly update their software and libraries to address known vulnerabilities.

Users can protect themselves from XSS attacks by being cautious when submitting information on unfamiliar websites and using browser extensions that block scripts from untrusted sources. It is also recommended to regularly update web browsers to ensure that they have the latest security features.

Overall, XSS attacks can have serious consequences and it is important to take measures to prevent and mitigate them in order to ensure the security and privacy of web applications and their users.