Hello,
On 16 March 2019, Wikimedia Foundation staff observed suspicious activity associated with Gerrit and as a precautionary step has taken Gerrit offline pending investigation.
The Wikimedia Foundation's Security, Site Reliability Engineering and Release Engineering teams are investigating this incident as well as potential improvements to prevent future incidents. More information will be posted on Phabricator (https://phabricator.wikimedia.org/T218472 ) as it becomes available and is confirmed. If you have any questions, please contact the Security (security@wikimedia.org trustandsafety@wikimedia.org ).
Thanks