MoinMoin 1.9.2 is a security bug fix release.
For details see: http://hg.moinmo.in/moin/1.9/raw-file/1.9.2/docs/CHANGES
Please update as soon as possible.
See http://moinmo.in/MoinMoinDownload for the release archive and the change log.
BTW, we still need much more people helping with cleaning up on master19.moinmo.in.
So, especially if you speak some non-english language, you can help!
See http://moinmo.in/MoinDev/Translation for details.