Here are some examples of resources which may be embedded cross-origin: For example, you can read the dimensions of an embedded image, the actions of an embedded script, or the availability of an embedded resource. Cross-origin reads are typically disallowed, but read access is often leaked by embedding.Cross-origin embedding is typically allowed.Examples are links, redirects, and form submissions.
Cross-origin writes are typically allowed.These interactions are typically placed into three categories: The same-origin policy controls interactions between two different origins, such as when you use XMLHttpRequest or an element. A more exhaustive list of failure cases can be found in Document.domain > Failures. localStorage, indexedDB, BroadcastChannel, SharedWorker). For example, it will throw a " SecurityError" DOMException if the document-domain Permissions-Policy is enabled or the document is in a sandboxed, and changing the origin in this way does not affect the origin checks used by many Web APIs (e.g. It has to be set in both so their port numbers are both null. Therefore, one cannot make :8080 talk to by only setting document.domain = "" in the first. Any call to document.domain, including document.domain = document.domain, causes the port number to be overwritten with null. The port number is checked separately by the browser. In this example, the page prints the value of the q query parameter from the page’s URL in the page’s content without escaping the value. However, could not set document.domain to, since that is not a superdomain of . The iframe loads the flawed page, and injects some script into it through the XSS flaw. Afterward, the page can pass the same-origin check with (assuming sets its document.domain to " " to indicate that it wishes to allow that - see document.domain for more).
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