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GHSA-v8fr-vxmw-6mf6

Mattermost Incorrect Authorization vulnerability

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-46702

Packages

EcosystemPackageAffectedFixed in
Go github.com/mattermost/mattermost-server < 0.0.0-20250513065225-4ae5d647fb88 0.0.0-20250513065225-4ae5d647fb88
Go github.com/mattermost/mattermost/server/v8 < 8.0.0-20250513065225-4ae5d647fb88 8.0.0-20250513065225-4ae5d647fb88
Go github.com/mattermost/mattermost/server/v8 >= 9.11.0, < 9.11.16 9.11.16
Go github.com/mattermost/mattermost/server/v8 >= 10.5.0, < 10.5.6 10.5.6
Go github.com/mattermost/mattermost/server/v8 >= 10.6.0, < 10.6.6 10.6.6
Go github.com/mattermost/mattermost/server/v8 >= 10.7.0, < 10.7.3 10.7.3
Go github.com/mattermost/mattermost/server/v8 >= 10.8.0, < 10.8.1 10.8.1

Details

As written in the advisory (Markdown source, shown as plain text).

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 restrictions and add or remove users to/from private channels via the playbook run participants feature, even when the 'Manage Members' permission has been explicitly removed. This can lead to unauthorized access to sensitive channel content and allow guest users to gain channel management privileges.

References

External links from the advisory. They lead to third-party sites.