CVE-2025-3446

Members Without Guest Invite Permissions Can Add Guests to Teams

Published May 15, 2025 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.

Remediation

Vendor Solution

Update Mattermost to versions 10.7.0, 10.6.2, 10.5.3, 10.4.5, 9.11.12 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-15149 Mattermost Fails to Validate Team Invite Permissions
Github GHSA Github GHSA GHSA-r7r2-m3vr-c8qc Mattermost Fails to Validate Team Invite Permissions
References
History
Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
Title Members Without Guest Invite Permissions Can Add Guests to Teams
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
May 15, 2025, 1:41 PM
Reserved
Apr 8, 2025, 11:30 AM
Status
Analyzed
Published
May 15, 2025, 11:15 AM
Modified
Jun 17, 2026, 9:19 AM