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There is an in-the-wild exploit targeting the update checker in 2.0.18 and 2.1.
If you are running 2.0.18.x, please upgrade HERE.
if you are running a 2.1 beta, please manually update your install by deleting the lines in UtilityController and settings.js indicated here: https://github.com/vanillaforums/Garden/commit/91904fa108a8a5011f684a990fd117ea8ff3625c
That is also the only change made in 22.214.171.124 if you want to selectively apply it.
This release completely removes the update checker.