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Start learningUpgrade github.com/mattermost/mattermost/server/channels/app
to version 9.11.9, 10.3.4, 10.4.3, 10.5.1 or higher.
github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative
Affected versions of this package are vulnerable to Missing Authentication for Critical Function due to servePluginRequest()
failing to enforce multifactor authentication for plugins, even when MFA is meant to be enabled.