[Mediawiki-l] made an administrator who hasn't yet established an account

[jidanni at jidanni.org]

Say, I noticed on Wikia one can make a user an administrator, even if he
has never logged in yet.

This exposes a security risk. A bureaucrat pre-makes some accounts for
future administrators, but before they establish accounts, somebody else
establishes an account with that name, and becomes an instant
administrator.

I'm wondering if the is a MediaWiki-wide bug, or just Wikia's.