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MEDIUM4.3

GHSA-85jj-c9jr-9jhx

Mattermost Improper Access Control vulnerability

Quick fix

GHSA-85jj-c9jr-9jhx — github.com/mattermost/mattermost/server/v8: upgrade to the fixed version with the command below.

go get github.com/mattermost/mattermost/server/v8@v9.1.1

Details

Mattermost fails to perform proper authorization in the `/plugins/focalboard/api/v2/users` endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/mattermost/mattermost/server/v8
Introduced in: 9.1.0Fixed in: 9.1.1
Fixgo get github.com/mattermost/mattermost/server/v8@v9.1.1
Go/github.com/mattermost/mattermost/server/v8
Introduced in: 9.0.0Fixed in: 9.0.2
Fixgo get github.com/mattermost/mattermost/server/v8@v9.0.2
Go/github.com/mattermost/mattermost/server/v8
Introduced in: 0Fixed in: 8.1.4
Fixgo get github.com/mattermost/mattermost/server/v8@v8.1.4
Go/github.com/mattermost/mattermost-server/v6
Introduced in: 0Fixed in: 7.8.13
Fixgo get github.com/mattermost/mattermost-server/v6@v7.8.13

References