Author role unable to set featured image (Error 403)

[yewzy]

Describe the bug
Users with the role of author are unable to set featured images in posts. I am able to replicate this in a fresh installation of WordPress (no plugins, 2021 theme).

2 errors are shown in the console:

api-fetch.min.js?ver=5f98b08f212ba8fa8b4685ad2e1b1378:2 GET https://dev.msiachild.org/wp-json/wp/v2/media/16?context=edit&_locale=user 403

Uncaught (in promise) {code: "rest_forbidden_context", message: "Sorry, you are not allowed to edit this post.", data: {…}} code: "rest_forbidden_context" data: status: 403 __proto__: Object message: "Sorry, you are not allowed to edit this post." __proto__: constructor: ƒ Object() hasOwnProperty: ƒ hasOwnProperty() isPrototypeOf: ƒ isPrototypeOf() propertyIsEnumerable: ƒ propertyIsEnumerable() toLocaleString: ƒ toLocaleString() toString: ƒ toString() valueOf: ƒ valueOf() __defineGetter__: ƒ __defineGetter__() __defineSetter__: ƒ __defineSetter__() __lookupGetter__: ƒ __lookupGetter__() __lookupSetter__: ƒ __lookupSetter__() get __proto__: ƒ __proto__() set __proto__: ƒ __proto__()

To reproduce
Steps to reproduce the behavior:

1. Log on to site as an author.
2. Add new post -> Set featured image

Expected behavior
The featured image can be selected and shown as preview.

Editor version (please complete the following information):

• WordPress version: [5.6]
• Does the website has Gutenberg plugin installed, or is it using the block editor that comes by default? ["default"]

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version 87.0

Additional context

• To report a security issue, please visit the WordPress HackerOne program: https://hackerone.com/wordpress.

[ntsekouras]

Thanks for reporting this @yewzy - I'll close this though as is duplicate of #18510.