CVE-2025-41443

MEDIUM

Mattermost 10.5.0-10.5.12 and 10.11.0-10.11.2 - Missing Authorization via Channel IDs Endpoint

Title source: llm

Description

Mattermost versions 10.5.x <= 10.5.12, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the `/api/v4/teams/{team_id}/channels/ids` endpoint

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0001

EPSS Percentile 1.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/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-862

Status published

Products (3)

mattermost/mattermost 0 - 8.0.0-20250822090405-e8c7e7d0252bGo

mattermost/mattermost-server 10.5.0 - 10.5.11Go

mattermost/mattermost_server 10.5.0 - 10.5.11

Published Oct 16, 2025

Tracked Since Feb 18, 2026