CVE-2023-6547

MediumCVSS 5.4/10Last modified Jun 17, 2026

Description

Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-284

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	<= 8.1.5; <= 9.2.1

References

https://mattermost.com/security-updatesIssue Tracking, Vendor Advisory
https://mattermost.com/security-updatesIssue Tracking, Vendor Advisory

Timeline

Published: Dec 12, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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