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MEDIUM5.4

GHSA-h5v9-xw2g-7hrq

Mattermost allows members with permission to convert public channels to private and convert private to public

Quick fix

GHSA-h5v9-xw2g-7hrq — github.com/mattermost/mattermost/server/v8: upgrade to the fixed version with the command below.

go get github.com/mattermost/mattermost/server/v8@v10.4.3

Details

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/mattermost/mattermost/server/v8
Introduced in: 10.4.0Fixed in: 10.4.3
Fixgo get github.com/mattermost/mattermost/server/v8@v10.4.3
Go/github.com/mattermost/mattermost/server/v8
Introduced in: 10.3.0Fixed in: 10.3.4
Fixgo get github.com/mattermost/mattermost/server/v8@v10.3.4
Go/github.com/mattermost/mattermost/server/v8
Introduced in: 9.11.0Fixed in: 9.11.9
Fixgo get github.com/mattermost/mattermost/server/v8@v9.11.9
Go/github.com/mattermost/mattermost-server
Introduced in: 0Fixed in: 9.11.9
Fixgo get github.com/mattermost/mattermost-server@v9.11.9
Go/github.com/mattermost/mattermost/server/v8
Introduced in: 0Fixed in: 8.0.0-20250218135018-e644e3c8e393
Fixgo get github.com/mattermost/mattermost/server/v8@v8.0.0-20250218135018-e644e3c8e393

References