Wikis have been taken offline out of an abundance of caution over recently discovered PHP vulnerabilities.
A patch is expected on October 21 at 14:00 UTC, at which point we will work to test and apply the patch.
All wikis will be brought back online once this is completed.

Wikis will be offline during this time. You may be able to access cached copies of the webpages but this is uncertain.
Duration is an estimate, it may take more or less time. There's a possibility we may need to rush the maintenance and go offline sooner. Details will come later.