Unauthorized Guest user access to Playbook

Summary

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.

Timeline

1. Jun 20, 2025, 2:31 PM UTCCVE published
2. Jun 23, 2025, 8:45 PM UTCCISA SSVC assessment

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

3. Jun 23, 2025, 8:45 PM UTCRecord last updated

Affected versions

• Mattermost Mattermost

  From 10.5.0 · through 10.5.5; From 9.11.0 · through 9.11.15; From 10.7.0 · through 10.7.2; From 10.6.0 · through 10.6.5

• github.com/mattermost/mattermost-serverGo

  fixed in 0.0.0-20250520060012-d0380305ef7a

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

  fixed in 8.0.0-20250520060012-d0380305ef7a

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

  From 10.5.0 · fixed in 10.5.6

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

  From 9.11.0 · fixed in 9.11.16

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

  From 10.8.0 · fixed in 10.8.1

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

  From 10.7.0 · fixed in 10.7.3

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

  From 10.6.0 · fixed in 10.6.6

• github.com/mattermost/mattermost-serverGo

  fixed in 0.0.0-20250520060012-d0380305ef7a; From 9.11.0+incompatible · fixed in 9.11.16+incompatible; From 10.5.0+incompatible · fixed in 10.5.6+incompatible; From 10.6.0+incompatible · fixed in 10.6.6+incompatible; From 10.7.0+incompatible · fixed in 10.7.3+incompatible; From 10.8.0+incompatible · fixed in 10.8.1+incompatible

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

  All versions

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

  All versions

References 1