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by novas0x2a 5806 days ago
Cookies have this problem, too (anyone from the same domain sees your cookies, and you can't really count on the cookie path). So does XMLHTTPRequest. Same origin[1] is pretty much the governing rule here; there wasn't any point in making pushState any more secure than the rest of the system.

1) http://en.wikipedia.org/wiki/Same_origin_policy