Does CSRF work with POST requests?

Applications can be developed to only accept POST requests for the execution of business logic. The misconception is that since the attacker cannot construct a malicious link, a CSRF attack cannot be executed.

Is CSRF token necessary for get?

If they don’t match, the request should be blocked to prevent a CSRF attack. However, a comparison of existing server headers does not provide sufficient protection against CSRF attacks, which is why a matching CSRF token is necessary. A CSRF token should be sent with every action that can result in a change of status.

How CSRF token is passed?

A CSRF token is a unique, secret, unpredictable value that is generated by the server-side application and transmitted to the client in such a way that it is included in a subsequent HTTP request made by the client.

How do I pass CSRF token in API?

The signature of the access token is stored in a cookie that is NOT accessible by JavaScript. The client reads the payload from the cookie and passes it in the Authentication-Header to the server. The server validates the token based on the signature which is sent in the HttpOnly cookie.

Is GET request vulnerable?

8 Answers. In general, and not limited to GET and POST but also to any data that comes from outside the system (including cookies in the case of web applications): Almost all vulnerabilities come down to “The user can run whatever code they like in the context you pass their input to”.

Why is CSRF important?

Why CSRF is important CSRF attacks can be used on a huge array of sites. If a site allows data to be altered on the user side, then it is a potential target for an attacker. With some of the fixes listed, above, your website can guarantee a much higher level of security.

Do we need CSRF in REST API?

Specifically, if this is a REST application you can require double-submission of CSRF tokens. If you do this, just be sure that you define it to a specific full-domain (www.mydomain.com) and not a parent domain (example.com), and that you also utilize the “samesite” cookie attribute which is gaining popularity.

Why get method is vulnerable?

$_GET method vulnerabilities Because in any case the password will only be visible in the users’ browser and not to anyone else. At least MD5 it before you put it in the URL if you really must. RESTfully speaking if you are authenticating/signing in a user you should be using POST.

Can applications using only POST be vulnerable?

Because the vulnerability can be only exploited via POST requests, its impact is very limited and it cannot be directly use for common Open Redirect attacks such as phishing.