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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.

PUBLISHED Reserved 2025-07-31 | Published 2025-08-21 | Updated 2025-08-21 | Assigner Mattermost




MEDIUM: 4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-1287: Improper Validation of Specified Type of Input

CWE-476: NULL Pointer Dereference

Product status

Default status
unaffected

10.8.0
affected

10.5.0
affected

9.11.0
affected

10.10.0
affected

10.9.0
affected

10.11.0
unaffected

10.8.4
unaffected

10.5.9
unaffected

9.11.18
unaffected

10.10.1
unaffected

10.9.4
unaffected

Credits

daw10 finder

References

mattermost.com/security-updates

cve.org (CVE-2025-8402)

nvd.nist.gov (CVE-2025-8402)

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