Channel export permitted on archived channel when viewing archived channels is disabled

Summary

Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the "Allow users to view archived channels" is disabled which allows a user to export channel contents when they shouldn't have access to it

Timeline

1. Feb 24, 2025, 7:23 AM UTCCVE published
2. Feb 24, 2025, 11:24 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Feb 24, 2025, 11:24 AM UTCRecord last updated

Affected versions

• Mattermost Mattermost

  From 10.1.0 · through 10.1.3; From 10.4.0 · through 10.4.1; From 9.11.0 · through 9.11.7; From 10.3.0 · through 10.3.2; From 10.2.0 · through 10.2.2

• github.com/mattermost/mattermost-serverGo

  From 9.11.0-rc1+incompatible · fixed in 9.11.8+incompatible; From 10.2.0-rc1+incompatible · fixed in 10.2.3+incompatible; From 10.3.0-rc1+incompatible · fixed in 10.3.3+incompatible; From 10.4.0-rc1+incompatible · fixed in 10.4.2+incompatible

• github.com/mattermost/mattermost-server/v5Go

  All versions

• github.com/mattermost/mattermost-server/v6Go

  All versions

• github.com/mattermost/mattermost/server/v8Go

  fixed in 8.0.0-20250110161910-96195f1bd746

• github.com/mattermost/mattermost/server/v8Go

  From 9.11.0-rc1 · fixed in 9.11.8

• github.com/mattermost/mattermost/server/v8Go

  From 10.2.0-rc1 · fixed in 10.2.3

• github.com/mattermost/mattermost/server/v8Go

  From 10.3.0-rc1 · fixed in 10.3.3

• github.com/mattermost/mattermost/server/v8Go

  From 10.4.0-rc1 · fixed in 10.4.2

References 1