CVE-2025-4128

LOW

Mattermost 9.11.0-9.11.13 and 10.5.0-10.5.4 - Incorrect Authorization via Teams API

Title source: llm

Description

Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 3.1

EPSS 0.0013

EPSS Percentile 31.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-863

Status published

Products (3)

mattermost/mattermost 0 - 8.0.0-20250422131222-701ddc896a10Go

mattermost/mattermost-server 10.5.0 - 10.5.5Go

mattermost/mattermost_server 9.11.0 - 9.11.14

Published Jun 11, 2025

Tracked Since Feb 18, 2026