Rocket.Chat 3.11, 3.12 and 3.13 contains a NoSQL injection vulnerability which allows unauthenticated access to an API endpoint. An attacker can possibly obtain sensitive information from a database, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
View the template here CVE-2021-22911.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2021-22911