CVE-2023-48732 - Vulnerability Details - OpenCVE

Description

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.

Published: 2024-01-02

Score: 4.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mattermost

Mattermost

unaffected

Version	Status	Constraints
`0`	affected	≤ 8.1.6
`8.1.7`	unaffected	—

Configuration 1 [-]

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

Update Mattermost Server to versions 8.1.7, 9.3.0 or higher.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2024-0399	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.
Github GHSA	GHSA-q7rx-w656-fwmv	Mattermost notified all users in the channel when using WebSockets to respond individually

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00585.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://mattermost.com/security-updates

History

Tue, 03 Jun 2025 15:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Mattermost Mattermost Server

MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2024-01-02T09:52:01.147Z

Updated: 2025-06-03T14:45:52.518Z

Reserved: 2023-12-21T08:00:43.425Z

Link: CVE-2023-48732

Vulnrichment

Updated: 2024-08-02T21:37:54.700Z

NVD

Status : Modified

Published: 2024-01-02T10:15:08.487

Modified: 2024-11-21T08:32:20.653

Link: CVE-2023-48732

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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