CVE-2025-41443
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-16

Last updated on: 2025-10-29

Assigner: Mattermost, Inc.

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
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Meta Information
Published
2025-10-16
Last Modified
2025-10-29
Generated
2026-06-16
AI Q&A
2025-10-16
EPSS Evaluated
2026-06-14
NVD
CVE-2025-41443
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mattermost mattermost_server From 10.5.0 (inc) to 10.5.11 (exc)
mattermost mattermost_server From 10.11.0 (inc) to 10.11.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

This vulnerability exists in Mattermost versions 10.5.x up to 10.5.10 and 10.11.x up to 10.11.2, where guest user permissions are not properly validated when accessing channel information. This flaw allows guest users to discover active public channels and their metadata by using the /api/v4/teams/{team_id}/channels/ids endpoint.

Impact Analysis

The vulnerability can impact you by allowing guest users to gain unauthorized visibility into active public channels and their metadata, potentially exposing information that should not be accessible to guests. This could lead to information disclosure risks within your Mattermost environment.

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