Cross-site request forgery

Cross-site request forgery, also known as one-click attack or session riding and abbreviated as CSRF (sometimes pronounced sea-surf) or XSRF, is a type of malicious <a href="/facts/Exploit_(computer_security)/EdlqsRJM">exploit</a> of a <a href="/facts/Website/SAsjJnca">website</a> or web application where unauthorized commands are submitted from a <a href="/facts/User_(computing)/zQRzG0KG">user</a> that the web application trusts. There are many ways in which a malicious website can transmit such commands; specially-crafted image tags, hidden forms, and <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a> <a href="/facts/XMLHttpRequest/3FHofhdx"> fetch</a> or XMLHttpRequests, for example, can all work without the user's interaction or even knowledge. Unlike <a href="/facts/Cross-site_scripting/dhtusKKm">cross-site scripting</a> (XSS), which exploits the trust a user has for a particular site, CSRF exploits the trust that a site has in a user's browser.
In a CSRF attack, an innocent end user is tricked by an attacker into submitting a web request that they did not intend. This may cause actions to be performed on the website that can include inadvertent client or server data leakage, change of session state, or manipulation of an end user's account.
The term "CSRF" is also used as an abbreviation in defences against CSRF attacks, such as techniques that use header data, form data, or cookies, to test for and prevent such attacks.

Cross-site request forgery open-in-new

Cross-site request forgery