MoinMoin port www/moinmoin has recently been updated to version 1.9.9.
Checking for release notes of this version, I noticed:
Download: MoinMoin 1.9.9 tar.gz (gpg signature)
You also need to apply this bugfix patch, sorry: https://bitbucket.org/thomaswaldmann/moin-1.9/commits/561b7a9c2bd91b61d26cd8a5f39aa36bf5c6159e
So it seems this mandatory fix from the author did not make it
into the 1.9.9, but should be applied by installers.
The www/moinmoin port does not include this patch, as far as I can tell.
If it is indeed mandatory, I believe it should find its way into the port.