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CVE-2025-12559

MEDIUM CVSS: 4.3 Published: 2025-11-27 Modified: 2026-06-17

Description

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 Platforms

Mattermost Mattermost Server

Weakness Type

CWE-200

References