Cloudanix VulnDB

CVE-2025-12559

Medium · 4.3

CVSS

4.3

EPSS

0.2%

Published

Nov 27, 2025

CISA due date

—

The record

Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint

Affected packages

Ecosystem Package Introduced Fixed
Go github.com/mattermost/mattermost-server 0 No fix
Go github.com/mattermost/mattermost-server 10.11.0 10.11.5
Go github.com/mattermost/mattermost-server 10.12.0 10.12.2
Go github.com/mattermost/mattermost-server 10.5.0 10.5.13
Go github.com/mattermost/mattermost-server 11.0.0 11.0.3
Go github.com/mattermost/mattermost-server/v5 0 No fix
Go github.com/mattermost/mattermost-server/v6 0 No fix
Go github.com/mattermost/mattermost/server/v8 0 8.0.0-20251015091448-abbf01b9db45
go github.com/mattermost/mattermost-server 10.11.0 10.11.5
go github.com/mattermost/mattermost-server 10.12.0 10.12.2
go github.com/mattermost/mattermost-server 10.5.0 10.5.13
go github.com/mattermost/mattermost-server 11.0.0 11.0.3
openSUSE:Leap 15.6 govulncheck-vulndb 0 0.0.20251230T014957-150000.1.134.1

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