CVE-2025-4128 LOW

CVE-2025-4128: Mattermost Guest User Information Disclosure Vulnerability

Vendor Mattermost
Product Mattermost
Weakness CWE-863 · Incorrect authorization
Published June 11, 2025
Last update June 11, 2025
View on NVD All CVEs

CVSS base score

3.1/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.

Key dates

02Disclosure timeline

June 11, 2025 CVE published
June 11, 2025 Record updated