CVE-2025-41443

MEDIUM4.3EPSS 0.01%

Mattermost has a Missing Authorization vulnerability

Published: 10/16/2025Modified: 11/5/2025

Also known as:GHSA-7cr3-38jm-6p45GO-2025-4031

Description

Mattermost versions 10.5.x <= 10.5.10, 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

Affected packages (3)

Go/github.com/mattermost/mattermost-server>= 10.5.0, < 10.5.11
Go/github.com/mattermost/mattermost-serverfrom 0
Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250822090405-e8c7e7d0252b

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References (6)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-41443
PATCHhttps://github.com/mattermost/mattermost
WEBhttps://github.com/mattermost/mattermost/commit/e8c7e7d0252bbf1e098aae4a5ea05d945afd7e70
WEBhttps://github.com/mattermost/mattermost/pull/31327
WEBhttps://github.com/mattermost/mattermost/pull/33778
WEBhttps://mattermost.com/security-updates