Web Security: Common Vulnerabilities And Their Mitigation - Sanitizing input

The video tutorial discusses the risks of code injection and the importance of validating and sanitizing user inputs to prevent security vulnerabilities like cross-site scripting (XSS). It provides a PHP example to illustrate how improper handling of form inputs can lead to security risks. The tutorial also highlights how modern browsers have built-in protections against such vulnerabilities.

What is the primary reason for sanitizing and validating user inputs?

• To prevent security vulnerabilities

• To increase website traffic

• To improve website performance

• To enhance user experience

Which of the following is an example of input validation?

• Encoding special characters

• Checking if an email address is in the correct format

• Removing HTML tags from input

• Converting input to lowercase

What is the role of encoding in input sanitization?

• To compress input data

• To improve input readability

• To neutralize suspicious characters

• To convert input to uppercase

Why is it important to validate the format of a phone number?

• To ensure it contains only alphabets

• To confirm it is a decimal number

• To verify it has the correct number of digits

• To check if it is a valid email address

What does the PHP_SELF variable represent in a form?

• The form's submission method

• The user's session ID

• The path to the current script

• The server's IP address

How can a malicious user exploit URL parameters?

• By modifying the server's configuration

• By altering the form's action attribute

• By injecting scripts into the URL

• By changing the server's IP address

What is a potential consequence of cross-site scripting (XSS)?

• Improved website performance

• Unauthorized script execution

• Enhanced user experience

• Increased website traffic

What happens when a script tag is injected into a trusted page?

• The page becomes faster

• The script is ignored

• The script is executed as part of the page

• The page is deleted

How do modern browsers help prevent XSS attacks?

• By disabling JavaScript

• By blocking all scripts

• By using an XSS auditor

• By encrypting user inputs

What does the XSS auditor do when it detects a potential attack?

• Executes the script

• Ignores the script

• Refuses to execute the script

• Sends a warning to the user