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Status published
Medium
CVE-2025-8402
Nil pointer dereference in bulk import crashes server
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- daw10
References
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
10.8.0, 10.5.0, 9.11.0, 10.10.0, 10.9.0, 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4
Timeline
Official Publish:
August 21st, 2025
Last Modified:
August 21st, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H