A web application is susceptible to cross-site scripting.
Which two methods allow this issue to be mitigated? (Choose two.)
Click on the arrows to vote for the correct answer
A. B. C. D. E.BD.
Cross-site scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious code into a web application by exploiting the trust that a user has in the application. Once injected, this code can steal sensitive user data or perform unauthorized actions on behalf of the user.
To mitigate the risk of XSS attacks, there are several methods that can be used. The two most appropriate methods from the given options are:
B. Limit user input to acceptable characters: Limiting user input to only acceptable characters is a method to prevent the injection of malicious code. By allowing only specific characters, the application can prevent users from submitting potentially harmful code. This technique is commonly known as input validation, and it can be implemented on both the client-side and server-side.
E. Remove all HTML/XML tags from user input: Removing all HTML/XML tags from user input is another method to prevent XSS attacks. By stripping all tags from user input, the application ensures that no code can be injected into the page. This technique is commonly known as output encoding, and it should be performed on the server-side before any user input is rendered.
A. Use only drop downs: This method is not directly related to preventing XSS attacks. Drop-down menus can be useful in limiting user input, but they are not sufficient on their own to prevent XSS attacks.
C. Encrypt user input on the client side: Encrypting user input on the client-side is not a suitable method to prevent XSS attacks. Encryption is used to protect sensitive data during transmission, but it does not prevent malicious code from being injected into the application.
D. Use AES encryption to secure the script: Using AES encryption to secure the script is not an appropriate method to prevent XSS attacks. Encryption is not used to prevent XSS attacks, and it is not an effective technique for protecting against this type of vulnerability.
In summary, to prevent XSS attacks, it is essential to implement input validation and output encoding on the server-side. By limiting user input to only acceptable characters and stripping all tags from user input, the application can significantly reduce the risk of XSS attacks.