CVE-2023-28357

MEDIUM

Rocket.Chat < 6.0.0 - Authenticated Private Channel Member Enumeration via Slash Command /mute

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Issue Tracking, Third Party Advisory
https://hackerone.com/reports/1445810

Scores

CVSS v3 4.3
EPSS 0.0041
EPSS Percentile 32.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-200 CWE-863
Status published
Products (1)
rocket.chat/rocket.chat < 6.0.0
Published May 11, 2023
Tracked Since Feb 18, 2026