🛡️ CVE-2023-28357
🟡 CVSS 4.3 — Medium ✅ No Known Exploit CWE-200 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE CWE-200
Public Exploit ✅ No
Source NVD
Published 2023-05-11
Updated 2026-06-08
Modified 2025-01-27
Fix URL N/A

Affected Packages

Software From version Fixed in
rocket.chat 6.0.0

References

Issue Tracking, Third Party Advisory https://hackerone.com/reports/1445810
Issue Tracking, Third Party Advisory https://hackerone.com/reports/1445810

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