VULNERABILITY INTELLIGENCE

CVE-2025-12559

CVSS score4.3 MEDIUM
EPSS probability0.23%
CISA KEVNot currently listed
Published2025-11-27
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-200

Primary references