Description

The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with.

Proof of Concept

Go to this URL:  https://clickjacker.io/test?url=https://www.commafeed.com/

Observe that the website is getting embeded in an Iframe.

Observe that the headers x-frame-options and content-security-policy frame ancestors are missing.

Impact

An attacker can trick a user into performing actions that are masked and hidden from the user's view. The impact varies widely, depending on the functionality of the underlying application. For example, in a social media application, clickjacking could be used to trik the user into changing privacy settings.