CVE-2025-12559CWE-200information-disclosure

CVE-2025-12559

Medium · published November 27, 2025

CVSS v3.1
4.3
EPSS
0%
Percentile
11.4
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00216 · 11.4th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2025-11-27T22:15Z
Affected products (4)
ProductVersionsFixed in
mattermost/mattermost_server≥ 10.5.0, < 10.5.1310.5.13
mattermost/mattermost_server≥ 10.11.0, < 10.11.510.11.5
mattermost/mattermost_server≥ 10.12.0, < 10.12.210.12.2
mattermost/mattermost_server≥ 11.0.0, < 11.0.311.0.3
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 27 NOV 16:36Z
    Information Disclosure in Common Teams API
    cvelistv5