Subsume means1/4/2023 If the response contains a policy at least as strict as the policy which the embedder requested, Policy, it can enforce it by returning a Content-Security-Policy or Allow-CSP-From header along with the response. This policy is transmitted along with the HTTP request for the framed content in an In short, the embedder proposes a Content Security Policy by setting an attribute on an iframe element. Proposes a mechanism which relies on an explicit opt-in from the embeddedĬontent, which ought to make it possible for widgets to cooperate with theirĮmbedders to negotiate a reasonable set of restrictions. Widgets, advertisements, and other kinds of third-party content. That said, it would be quite useful to be able to place restrictions upon To avoid reintroducing them in a new form. Of issues in past features such as X-XSS-Protection, so we must be careful Secure page by denying it access to particular scripts. Loading, and it’s very possible to introduce vulnerabilities into an otherwise Allowing CSP to apply directly to these third-partyĬontexts would be dangerous CSP gives quite granular control over resource Give developers the ability to apply restrictions to third-party content Malicious script, style, and other resource types.
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