- What is XSS? …
- What are the types of XSS attacks? …
- How do you find out if an application is susceptible to XSS? …
- Can you explain what a reflected XSS attack is? …
- Can you explain what a stored XSS attack is? …
- Can you explain what a DOM based XSS attack is?
We will discuss around Application security interview questions/Penetration testing interview questions which consists of a list of Most Frequently Asked questions about security and also covered Security Engineer Interview Questions and cyber security interview questions:
XSS | Cross-Site Scripting | XSS Interview Questions | Cyber Security Interview Questions
Ans: In Stored XSS, the attacker plants a malicious script (also called payload) on a web page. Comment pages, forums, and other similar platforms can be used to store payloads. When the user browses these pages, these payloads are executed and sends cookies information to an attacker.
Ans: XSS can be prevented by sanitizing user input to the application. Always allowed those elements as input which is absolutely essential for that field.
Ans: By using XSS, the session id of the genuine user can be stolen by the attacker. The browser uses the session id to identify your credentials in an application and helps you keep login in till you sign off from an application. An attacker can write a code to extract information from cookies that contain session-id and other information. Later, the same session id can be used by an attacker to browse the application on behalf of the user without actually logged in to the application.
Ans: By using XST technique, attackers are able to steal cookies by bypassing “http only” attribute.
Ans: Other methods where attackers store malicious scripts (also called payloads) are discussion forums, the comment section of websites, and other similar platforms. Whenever the user navigates those pages, payloads got executed, and the user’s cookies information automatically sends to an attacker.
What does XSS stand for?
XSS is an attack vector that takes advantage of dynamically generated Web pages. In an XSS attack, a web application is sent with a malicious script that runs when it is read by an unsuspecting users browser or by an application that has not protected itself against cross-site scripting. This malicious script is saved into the application via an unsanitized input vector.
What is the potential impact?
XSS attacks can compromise web application end users sessions or machines. XSS attacks can also be targeted at admin users, which can lead to privilege escalation within the web app that increases the potential for server compromise.
Base Level -1 || Critical || Application security interview questions
HTTP being a stateless protocol uses cookies to handle the web application state.HTTP can handle web application state in the below approaches and maintains session :
The data might be stored in cookies or in the web server’s session.
FAQ
What are the main reasons for XSS?
What type of vulnerability is XSS?
