CVE-2025-47871

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 informatio...

Exposure of Sensitive Information Through Metadata

Overview github.com/mattermost/mattermost-plugin-playbooks/server/app is a package for reliable and repeatable processes using checklists, automation, and retrospectives Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Metadata through improper...

Exposure of Sensitive Information Through Metadata

Overview Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Metadata through improper enforcement of channel member permissions for playbook run participants. An attacker can access sensitive information about linked private channels, such as channel nam...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via improper enforcement of permissions in the playbook run participant management process. An attacker can gain unauthorized access to sensitive channel content and escalate privileges by adding or removing user...

CVE-2025-47871

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 informatio...

CVE-2025-46702 Mattermost Playbooks allows privilege escalation through improper access control in playbook run participant management

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 enforce channel member management permissions when adding participants to playbook runs. This allows authenticated users with member-level permissions to bypass system admin...

CVE-2025-47871 Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API

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 informatio...

CVE-2025-47871

Mattermost requires update: 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 validate channel membership when retrieving playbook run metadata. This allows authenticated users who are playbook members but not channel members to access sensitive...

Improper Access Control

Mattermost is vulnerable to Improper Access Control. The vulnerability is due to inadequate enforcement of channel member management permissions due to a flaw in how playbook run participants are handled when linked to channels, allowing unauthorized user modifications...

Unauthorized Access

github.com/mattermost/mattermost-server is vulnerable to unauthorized access. The vulnerability is due to improper access control caused by a failure to correctly retrieve and validate requestorInfo for guest users, allowing attackers to access playbook runs without proper authorization...

CVE-2025-3228

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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run...

CVE-2025-3227

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 enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public...

GHSA-QWWM-C582-82RX Mattermost allows unauthorized channel member management through playbook runs

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 enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public...

Mattermost allows unauthorized channel member management through playbook runs

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 enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public...

GHSA-4578-6GJH-F2JM Mattermost allows an unauthorized Guest user access to Playbook

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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization through improper enforcement of channel member permissions for playbook run participants. An attacker without the 'Manage Channel Members' permission can add or remove users from public and private channels by...

Mattermost allows an unauthorized Guest user access to Playbook

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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run...

CVE-2025-3227

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 enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public...

CVE-2025-3228 Unauthorized Guest user access to Playbook

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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run...

CVE-2025-3228 Unauthorized Guest user access to Playbook

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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run...