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Description

Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration

PUBLISHED Reserved 2025-08-15 | Published 2025-09-19 | Updated 2025-09-19 | Assigner Mattermost




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

Problem types

CWE-639: Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

10.5.0 (semver)
affected

9.11.0 (semver)
affected

10.11.0
unaffected

10.5.9
unaffected

9.11.18
unaffected

Credits

daw10 finder

References

mattermost.com/security-updates

cve.org (CVE-2025-9081)

nvd.nist.gov (CVE-2025-9081)

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