FYI - Just wanted to share with you this critical info which you can find at:
https://rocket.chat/2018/01/17/security-vulnerability-disclosure/
>> Security Vulnerability in 0.57.3, 0.58.3 and below
All users are advised to upgrade Rocket.Chat Server to 0.57.4, 0.58.4, 0.59.0 or greater.
Rocket.Chat Server version 0.58.3, 0.57.3 and prior versions are vulnerable to a NoSQL injection which can lead to an administrator account takeover.
The details of the vulnerability will be shared in a future update. If you have any questions, concerns or require advice please contact security@rocket.chat or chat to us on https://open.rocket.chat/channel/support