Is CVE-2023-28357 in the CISA KEV catalog?

No. CVE-2023-28357 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-28357?

CVE-2023-28357 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2023-28357?

CVE-2023-28357 has an EPSS score of 0.41% (33th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28357?

Upgrade rocket.chat to 6.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2023-28357

MEDIUM

4.3

CVSS v3

NVD

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.

CWE-200Information Exposure CWE-863Incorrect Authorization

How to fix

Remediation Available

rocket.chatNVD

Affected:< 6.0.0Fixed in:6.0.0CVE-2023-28357derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.41%probability of exploitation in 30 days

33rdpercentile

Low risk: more likely to be exploited than 33% of all known CVEs.

References

Third-Party Advisory1

hackerone.com

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-01-27.