VULNERABILITY INTELLIGENCE

CVE-2023-28357

CVSS score4.3 MEDIUM
EPSS probability0.41%
CISA KEVNot currently listed
Published2023-05-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

A vulnerability has been identified in Rocket.Chat, where the ACL checks in the Slash Command /mute occur after checking whether a user is a member of a given channel, leaking private channel members to unauthorized users. This allows authenticated users to enumerate whether a username is a member of a channel that they do not have access to.

Weakness classification

  • support@hackerone.com: CWE-200
  • nvd@nist.gov: CWE-200
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-863

Primary references