managers/socketManager.ts in PreMiD through 2.1.3 has a locally hosted socketio web server (port 3020) open to all origins, which allows attackers to obtain sensitive Discord user information.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24928
Reference (s):
- https://github.com/PreMiD/PreMiD/pull/501