CVE-2025-8402

Nil pointer dereference in bulk import crashes server

State: Published
Severity: 4.9 Medium
Published: Aug 21, 2025
Updated: Aug 21, 2025
Reserved: Jul 31, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	4.9 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H	Mattermost

Weaknesses

CWE-1287 Improper Validation of Specified Type of Input
CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
MattermostMattermost	10.8.0 through 10.8.3Affected 10.5.0 through 10.5.8Affected 9.11.0 through 9.11.17Affected 10.10.0Affected 10.9.0 through 10.9.3Affected 10.11.0Not affected 10.8.4Not affected 10.5.9Not affected 9.11.18Not affected 10.10.1Not affected 10.9.4Not affected

References

https://mattermost.com/security-updates

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