What is CVE-2023-28357?

CVE-2023-28357 is a medium-severity vulnerability in Rocket.chat, classified under Information Disclosure. CVSS score: 4.3/10. Published 2023-05-11.

How severe is CVE-2023-28357?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Rocket.chat

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.

Vulnerability class: Information Disclosure

EPSS: 0.004 (33.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Rocket.chat
N/a Rocket.chat — versions This issue has been fixed in version 6.0> and is backported for the supported versions. Check this document for more info: https://docs.rocket.chat/resources/get-support/enterprise-support#rocket.chat-versions

Weakness classification (CWE)

References

support@hackerone.com (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-28357?: CVE-2023-28357 is a medium-severity vulnerability in Rocket.chat, classified under Information Disclosure. CVSS score: 4.3/10. Published 2023-05-11.
How severe is CVE-2023-28357?: Medium severity. CVSS v3 base score is 4.3 out of 10.