What is the CVSS score of CVE-2023-48732?

CVE-2023-48732 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.6%.

Which versions of Mattermost Server are affected by CVE-2023-48732?

CVE-2023-48732 presents moderate security risk, a information exposure vulnerability rated CVSS 4.3. Sensitive information could be exposed to unauthorized parties.. A patch is available.

How to fix or mitigate CVE-2023-48732?

During next maintenance window: Identify affected systems and apply vendor patches when convenient. Review data exposure and access controls.

Mattermost Server CVE-2023-48732

MEDIUM

Information Exposure (CWE-200)

2024-01-02 responsibledisclosure@mattermost.com

Information Disclosure Mattermost Server

4.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 28, 2026 - 19:33 vuln.today

CVE Published

Jan 02, 2024 - 10:15 nvd

MEDIUM 4.3

DescriptionCVE.org

AnalysisAI

Mattermost fails to scope the WebSocket response around notified users to a each user separately resulting in the WebSocket broadcasting the information about who was notified about a post to. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.

Technical ContextAI

This vulnerability is classified as Exposure of Sensitive Information (CWE-200), which allows attackers to access sensitive data that should not be disclosed. Mattermost fails to scope the WebSocket response around notified users to a each user separately resulting in the WebSocket broadcasting the information about who was notified about a post to everyone else in the channel. Affected products include: Mattermost Mattermost Server.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Minimize information in error messages, implement proper access controls, encrypt sensitive data at rest and in transit.