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Should the /admin/resources/assetthumbs/{assetid}/200 be accessible without being logged in?

I’ve just noticed I can access thumbnails that way, and with some fiddling even let it generate huge images for me

This is on v2.6.3002.

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  • Is this on a local setup or live site? Any other details you could give us? What do your permissions look like? Jan 26 '18 at 16:49
  • Local and live. This isn't permission related and affects all Craft 2 sites see answer below from Brad Bell.
    – K.Rijpstra
    Jan 29 '18 at 12:35
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In Craft 2, this is expected behavior.

In Craft 3, we "fixed" it by using an Asset's UID instead of its ID, which makes it harder to guess.

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  • So in Craft 2 it is possible to see al the uploaded images without logging in and scale them to any size even so big PHP runs out of memory. This seems like a serious issue to me. Why doesn't Craft check if the user is logged in to the admin?
    – K.Rijpstra
    Jan 29 '18 at 11:35
  • 1
    For the next release asset thumbnails will only be generated on Control Panel requests by logged in users. Going to go ahead and vote to close this as a bug.
    – Brad Bell
    Jan 29 '18 at 22:23

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