CVE-2025-47871

Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API

State: Published
Severity: 4.3 Medium
Published: Jun 30, 2025
Updated: Jun 30, 2025
Reserved: May 23, 2025

Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	10.5.0 through 10.5.5Affected 9.11.0 through 9.11.15Affected 10.8.0Affected 10.7.0 through 10.7.2Affected 10.6.0 through 10.6.5Affected 10.9.0Not affected 10.5.6Not affected 9.11.16Not affected 10.8.1Not affected 10.7.3Not affected 10.6.6Not affected

References

https://mattermost.com/security-updates

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