CVE-2025-4128

Mattermost Guest User Information Disclosure Vulnerability

State: Published
Severity: 3.1 Low
Published: Jun 11, 2025
Updated: Jun 11, 2025
Reserved: Apr 30, 2025

Description

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}.

Scores

CVSS	Score	Vector	Source
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	10.5.0 through 10.5.4Affected 9.11.0 through 9.11.13Affected 10.8.0Not affected 10.5.5Not affected 9.11.14Not affected

References

https://mattermost.com/security-updates

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