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Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to sanitize user data which allows system administrators to access password hashes and MFA secrets via the POST /api/v4/users/{user_id}/email/verify/member endpoint

PUBLISHED Reserved 2025-10-15 | Published 2025-11-14 | Updated 2025-12-01 | Assigner Mattermost




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

Problem types

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Product status

Default status
unaffected

10.11.0 (semver)
affected

10.5.0 (semver)
affected

10.12.0 (semver)
affected

11.0.0
unaffected

10.11.4
unaffected

10.5.12
unaffected

10.12.1
unaffected

Credits

Christian Iwata Nilsson finder

References

mattermost.com/security-updates

cve.org (CVE-2025-11794)

nvd.nist.gov (CVE-2025-11794)

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