CVE-2025-8402

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server:10.10.0:-::::::

History

01 Oct 2025, 20:23

Type	Values Removed	Values Added
CPE		cpe:2.3:a:mattermost:mattermost_server:10.10.0:-:::::: cpe:2.3:a:mattermost:mattermost_server::::::::
References	~~() https://mattermost.com/security-updates -~~	() https://mattermost.com/security-updates - Vendor Advisory
First Time		Mattermost mattermost Server Mattermost

22 Aug 2025, 18:08

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 no pueden validar los datos de importación, lo que permite que un administrador del sistema bloquee el servidor a través de la función de importación masiva.

21 Aug 2025, 17:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-08-21 17:15

Updated : 2025-10-01 20:23

NVD link : CVE-2025-8402

Mitre link : CVE-2025-8402

CVE.ORG link : CVE-2025-8402

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-476

NULL Pointer Dereference

CWE-1287

Improper Validation of Specified Type of Input

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