Description
Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions
Published: 2025-10-16
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

Vendor Solution

Update Mattermost to versions 10.12.0, 10.10.3, 10.5.11, 10.11.3 or higher.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3q4q-wqm6-hvf3 Mattermost has a Missing Authorization vulnerability
References
History

Tue, 21 Oct 2025 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server

Mon, 20 Oct 2025 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost

Thu, 16 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 16 Oct 2025 09:00:00 +0000

Type Values Removed Values Added
Description Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions
Title Slack import bypasses email verification for team access controls
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}


Subscriptions

Mattermost Mattermost Mattermost Server
cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2025-10-16T14:00:19.181Z

Reserved: 2025-09-16T08:32:57.345Z

Link: CVE-2025-41410

cve-icon Vulnrichment

Updated: 2025-10-16T13:59:54.143Z

cve-icon NVD

Status : Analyzed

Published: 2025-10-16T09:15:33.313

Modified: 2025-10-21T18:00:54.627

Link: CVE-2025-41410

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-10-20T13:25:21Z

Weaknesses