How scan.nextcloud.com works?

Hello,

Thank for Nextcloud!! :slight_smile:

How scan.nextcloud.com works?
How does this tool find your Nextcloud version?
The fact that Nextcloud version can be known without authentication is a security issue, right?
Does Nextcloud keep data after a website is scanned?

Have a good day! :sunny:

nobody!? :frowning_face:

Nice question,
Admins please answer this to clear the point.

@jospoortvliet can give you the nitty gritty, but no it should not be a security risk that the version number is not hidden, and yes the result is cached.