- Impersonate or masquerade as the victim user.
- Carry out any action that the user is able to perform.
- Read any data that the user is able to access.
- Capture the user's login credentials.
- Perform virtual defacement of the web site.
- Inject trojan functionality into the web site.
What can an XSS do?
Cross-site scripting (XSS) is a type of security vulnerability typically found in web applications. XSS attacks
enable attackers to inject client-side scripts into web pages viewed by other users
. A cross-site scripting vulnerability may be used by attackers to bypass access controls such as the same-origin policy.
What can be stolen with XSS?
Stealing cookies
is a traditional way to exploit XSS. Most web applications use cookies for session handling. You can exploit cross-site scripting vulnerabilities to send the victim's cookies to your own domain, then manually inject the cookies into your browser and impersonate the victim.
What are the types of XSS attacks?
- Stored XSS (AKA Persistent or Type I) Stored XSS generally occurs when user input is stored on the target server, such as in a database, in a message forum, visitor log, comment field, etc. …
- Reflected XSS (AKA Non-Persistent or Type II) …
- DOM Based XSS (AKA Type-0)
How common are XSS attacks?
In the last nine years, the most frequent bug on websites the world over has been the vulnerability XSS (Cross-site Scripting), which makes up
18% of the bugs found
.
Why is session hijacking successful?
This means that a successful session hijack
can give the attacker SSO access to multiple web applications
, from financial systems and customer records to line-of-business systems potentially containing valuable intellectual property.
What is exploit XSS?
Cross-Site Scripting (XSS) and the various types of it
It is a
web-based vulnerability in which an attacker can inject malicious JavaScript code into the application
, which will be later executed.
What is XSS and CSRF?
Cross-site scripting
(or XSS) allows an attacker to execute arbitrary JavaScript within the browser of a victim user. Cross-site request forgery (or CSRF) allows an attacker to induce a victim user to perform actions that they do not intend to.
How does self XSS work?
Self-XSS operates
by tricking users into copying and pasting malicious content into their browsers' web developer console
. Usually, the attacker posts a message that says by copying and running certain code, the user will be able to hack another user's account.
Who was the victim of the XSS attacks?
XSS is a web-based attack performed on vulnerable web applications. In XSS attacks, the victim is
the user and not the application
.
What is the difference between DOM XSS and reflected XSS?
While DOM-based XSS occurs by processing data from an untrusted source by writing data to a potentially dangerous sink within the DOM, reflected XSS occurs when
an application obtains data in an HTTP request
and includes that data within the immediate response in an unsafe way.
How often does XSS occur?
The proportion of XSS of all web application attacks has grown from
7% to 10% in the first quarter of 2017
. For the past four years (and more), XSS vulnerabilities have been present in around 50% of websites.
Why are XSS attacks so common?
A web page or web application is vulnerable to XSS if it uses unsanitized user input in the output that it generates. … XSS attacks are possible in VBScript, ActiveX, Flash, and even CSS. However, they are most common in JavaScript, primarily because JavaScript is
fundamental to most browsing experiences
.
Why is XSS so common?
Because the payload is delivered by a vulnerable site
, XSS will prey on a user's trust relationship with the website they are visiting – and the browser has no way of discerning if the code was created by the original developer or a malicious attacker. …
What is blind hijacking?
A type of session hijacking
in which the cybercriminal does not see the target host's response to the transmitted requests
.
What is season hijacking?
In computer science, session hijacking, sometimes also known as cookie hijacking is the exploitation of a valid computer session—sometimes also called a session key—to gain unauthorized access to information or services in a computer system.
