[wp-trac] [WordPress Trac] #37994: Preflight CORS check fails because of missing "Access-Control-Allow-Headers: Content-Type"

[WordPress Trac]

#37994: Preflight CORS check fails because of missing "Access-Control-Allow-
Headers: Content-Type"
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 Reporter:  nuvoPoint     |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  REST API      |     Version:  4.6.1
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by jnylen0):

 We're currently patching this on WordPress.com - otherwise POST/PUT
 requests with `Content-Type: application/json` fail because they are not
 "simple requests" according to the [https://developer.mozilla.org/en-
 US/docs/Web/HTTP/Access_control_CORS#Overview CORS rules].  We should fix
 this in core instead of making people patch around it.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37994#comment:2>
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