Rocket.Chat through 3.9.1 is susceptible to information disclosure. An attacker can enumerate email addresses via the password reset function and thus potentially access sensitive information, modify data, and/or execute unauthorized operations.
View the template here CVE-2020-28208.yaml
References:
https://trovent.github.io/security-advisories/TRSA-2010-01/TRSA-2010-01.txt