CVE-2025-27933

Unauthorized Private-to-Public Channel Conversion

Published Mar 21, 2025 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public

Analysis

No analysis available yet

Remediation

Vendor Solution

Update Mattermost to versions 10.5.0, 10.4.3, 10.3.4, 9.11.9 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-7204 Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public
Github GHSA Github GHSA GHSA-h5v9-xw2g-7hrq Mattermost allows members with permission to convert public channels to private and convert private to public
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 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public
Title Unauthorized Private-to-Public Channel Conversion
Weaknesses CWE-863
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Mar 21, 2025, 1:32 PM
Reserved
Mar 20, 2025, 8:20 AM
Status
Analyzed
Published
Mar 21, 2025, 9:15 AM
Modified
Jun 17, 2026, 9:04 AM