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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}.

PUBLISHED Reserved 2025-04-30 | Published 2025-06-11 | Updated 2025-06-11 | Assigner Mattermost




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

Problem types

CWE-863: Incorrect Authorization

Product status

Default status
unaffected

10.5.0 (semver)
affected

9.11.0 (semver)
affected

10.8.0
unaffected

10.5.5
unaffected

9.11.14
unaffected

Credits

hackit_bharat finder

References

mattermost.com/security-updates

cve.org (CVE-2025-4128)

nvd.nist.gov (CVE-2025-4128)