CVE-2025-8402

Published: Aug 21, 2025

Modified: Aug 21, 2025

PUBLISHED

CVSS v3.1

4.9

MEDIUM

Description

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.

Vendor	Product	Versions
Mattermost	Mattermost	affected `10.8.0 - <= 10.8.3` affected `10.5.0 - <= 10.5.8` affected `9.11.0 - <= 9.11.17` affected `10.10.0` affected `10.9.0 - <= 10.9.3` +6 more versions

Weaknesses (CWE)

CWE-1287

CWE-476

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

https://mattermost.com/security-updates

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CVE-2025-8402

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References