Rocket.Chat through 3.4.2 allows XSS where an attacker can send a specially crafted message to a channel or in a direct message to the client which results in remote code execution on the client side.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15926
Reference (s):
- https://blog.redteam.pl/2020/08/rocket-chat-xss-rce-cve-2020-15926.html
- https://github.com/RocketChat/Rocket.Chat/commits/develop
- https://github.com/RocketChat/Rocket.Chat/pull/18356