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Start learningUpgrade github.com/mattermost/mattermost-server/server/v8/channels/app
to version 9.5.13, 9.11.5, 10.0.3, 10.1.3 or higher.
Affected versions of this package are vulnerable to Improper Input Validation due to improper validation of specified types of input. An attacker can manipulate the server behavior or cause unintended actions.