CVE-2025-12559

published 2025-11-27

CVE-2025-12559: 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…

medium 4.3 CVSS 3.1

AV N AC L PR L UI N S U C L I N A N

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

13 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-server	>= 10.11.0 < 10.11.5	10.11.5
github.com	mattermost_mattermost-server	>= 10.12.0 < 10.12.2	10.12.2
github.com	mattermost_mattermost-server	>= 10.5.0 < 10.5.13	10.5.13
github.com	mattermost_mattermost-server	>= 11.0.0 < 11.0.3	11.0.3
github.com	mattermost_mattermost_server_v8	>= 0 < 8.0.0-20251015091448-abbf01b9db45	8.0.0-20251015091448-abbf01b9db45
mattermost	mattermost	10.11.0 – 10.11.4	—
mattermost	mattermost	10.12.0 – 10.12.1	—
mattermost	mattermost	10.5.0 – 10.5.12	—
mattermost	mattermost	11.0.0 – 11.0.2	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.5	10.11.5
mattermost	mattermost_server	>= 10.12.0 < 10.12.2	10.12.2
mattermost	mattermost_server	>= 10.5.0 < 10.5.13	10.5.13
mattermost	mattermost_server	>= 11.0.0 < 11.0.3	11.0.3

CWE-200