UpHeron
All vulnerabilities

Servers and applications

CVE-2023-28357

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.

Severity
Medium 4.3
Published
11 May 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
6.0.0
Sources
NVD

Affected software

SoftwareAffected versions
Rocket.ChatServers and applications · cpe:a:rocket.chat:rocket.chat
  • Every version before 6.0.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-28357
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-28357