Can same origin policy be bypassed?

Can same origin policy be bypassed?

Exploiting CORS For example, if the policy only checks if an origin URL starts with www.site.com, that policy can be bypassed by using wildcard subdomains. Another common misconfiguration of CORS that can be exploited is setting allowed origins to NULL or attacker.com.

Are subdomains same-origin?

http://www.example.com/page.html and http://example.com/page.html have a different origin: the subdomain (hostname) is different (www.example.com vs example.com). http://www.example.com/page.html and http://www.example.com/page.html:8080 have a different origin due to a different port (80 vs 8080).

Which is the best definition of same origin policy?

Same-origin policy. In computing, the same-origin policy (sometimes abbreviated as SOP) is an important concept in the web application security model. Under the policy, a web browser permits scripts contained in a first web page to access data in a second web page, but only if both web pages have the same origin.

Is there a way to relax same origin policy?

The other technique for relaxing the same-origin policy is standardized under the name Cross-Origin Resource Sharing (CORS). This standard extends HTTP with a new Origin request header and a new Access-Control-Allow-Origin response header.

Is there a same origin policy for WebSockets?

WebSockets. Modern browsers will permit a script to connect to a WebSocket address without applying the same-origin policy. However, they recognize when a WebSocket URI is used, and insert an Origin: header into the request that indicates the origin of the script requesting the connection. To ensure cross-site security,…

What does it mean when a document does not have the same origin?

Cross-origin script API access JavaScript APIs like iframe.contentWindow, window.parent, window.open, and window.opener allow documents to directly reference each other. When two documents do not have the same origin, these references provide very limited access to Window and Location objects, as described in the next two sections.