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Status published
Medium
CVE-2025-11794
Password hash and MFA secret returned in user email verification endpoint
Vulnerability 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
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:
- Christian Iwata Nilsson
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
10.11.0, 10.5.0, 10.12.0, 11.0.0, 10.11.4, 10.5.12, 10.12.1
Timeline
Official Publish:
November 14th, 2025
Last Modified:
December 1st, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N