MoinMoin 1.8.7 is a security bug fix release. 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.