Rocket.Chat is an open-source fully customizable communications platform developed in JavaScript. In Rocket.Chat before versions 3.11.3, 3.12.2, and 3.13 an issue with certain regular expressions could lead potentially to Denial of Service. This was fixed in versions 3.11.3, 3.12.2, and 3.13.
A sanitization vulnerability exists in Rocket.Chat server versions <3.13.2, <3.12.4, <3.11.4 that allowed queries to an endpoint which could result in a NoSQL injection, potentially leading to RCE.
An information disclosure vulnerability exists in the Rocket.Chat server fixed v3.13, v3.12.2 & v3.11.3 that allowed email addresses to be disclosed by enumeration and validation checks.
Rocket.Chat before 3.11, 3.10.5, 3.9.7, 3.8.8 is vulnerable to persistent cross-site scripting (XSS) using nested markdown tags allowing a remote attacker to inject arbitrary JavaScript in a message. This flaw leads to arbitrary file read and RCE on Rocket.Chat desktop app.
The `specializedRendering` function in Rocket.Chat server before 3.9.2 allows a cross-site scripting (XSS) vulnerability by way of the `value` parameter.
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.