Arbitrary file read in Mattermost Boards via import & export board archive

Summary

Mattermost versions 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 properly validate board blocks when importing boards which allows an attacker could read any arbitrary file on the system via importing and exporting a specially crafted import archive in Boards.

Timeline

1. Feb 24, 2025, 7:25 AM UTCCVE published
2. Feb 24, 2025, 11:22 AM UTCCISA SSVC assessment

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

3. Feb 24, 2025, 11:22 AM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Mattermost Mattermost

  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/server/v8Go

  fixed in 8.0.0-20250122165010-4ed702ccff4e

• 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

• 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

References 3