CVE-2024-34029

Mattermost versions 9.5.x <= 9.5.3, 9.7.x <= 9.7.1 and 8.1.x <= 8.1.12 fail to perform a proper authorization check in the /api/v4/groups/<group-id>/channels/<channel-id>/link endpoint which allows a user to learn the members of an AD/LDAP group that is linked to a team by adding the group to a channel, even if the user has no access to the team.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::

History

30 Sep 2025, 15:26

Type	Values Removed	Values Added
First Time		Mattermost mattermost Server Mattermost
CPE		cpe:2.3:a:mattermost:mattermost_server::::::::
References	~~() https://mattermost.com/security-updates -~~	() https://mattermost.com/security-updates - Vendor Advisory

21 Nov 2024, 09:17

Type	Values Removed	Values Added
References	~~() https://mattermost.com/security-updates -~~	() https://mattermost.com/security-updates -

28 May 2024, 12:39

Type	Values Removed	Values Added
Summary		(es) Las versiones 9.5.x <= 9.5.3, 9.7.x <= 9.7.1 y 8.1.x <= 8.1.12 de Mattermost no realizan una verificación de autorización adecuada en /api/v4/groups// canales//link endpoint que permite a un usuario conocer los miembros de un grupo AD/LDAP que está vinculado a un equipo agregando el grupo a un canal, incluso si el usuario no tiene acceso al equipo.

26 May 2024, 14:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-05-26 14:15

Updated : 2025-09-30 15:26

NVD link : CVE-2024-34029

Mitre link : CVE-2024-34029

CVE.ORG link : CVE-2024-34029

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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