CVE-2025-4128

MediumCVSS 4.3/10Last modified Jun 17, 2026

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}.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-863

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	>= 10.5.0, <= 10.5.4; >= 9.11.0, <= 9.11.13

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Jun 11, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

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