CVE-2025-27715

Auto-Enrollment of Team Admins into Private Channels without explicit consent

Published Mar 21, 2025 CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Description
Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.

Analysis

No analysis available yet

Remediation

Vendor Solution

Update Mattermost to versions 10.5.0, 9.11.9 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-7203 Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.
Github GHSA Github GHSA GHSA-cw7q-5cgc-h3h9 Mattermost fail to prompt for explicit approval before adding a team admin to a private channel
References
History
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
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 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.
Title Auto-Enrollment of Team Admins into Private Channels without explicit consent
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Mar 21, 2025, 1:35 PM
Reserved
Mar 20, 2025, 8:20 AM
Status
Analyzed
Published
Mar 21, 2025, 9:15 AM
Modified
Jun 17, 2026, 9:04 AM