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CVE-2025-41436

Good to know:

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Date: November 14, 2025

Mattermost versions <11.0 fail to properly enforce the "Allow users to view archived channels" setting which allows regular users to access archived channel content and files via the "Open in Channel" functionality from followed threads

Severity Score

Related Resources (6)

https://github.com/advisories/GHSA-x3hx-ch7p-8xgg
https://github.com/mattermost/mattermost/commit/c8d66301415d5b447df0e829bdbaa92e8a83ecf8
https://nvd.nist.gov/vuln/detail/CVE-2025-41436
https://github.com/mattermost/mattermost
https://mattermost.com/security-updates
https://www.mend.io/vulnerability-database/CVE-2025-41436

Severity Score

Weakness Type (CWE)

Incorrect Authorization

CWE-863

Top Fix

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Upgrade Version

Upgrade to version github.com/mattermost/mattermost - v11.0.0;github.com/mattermost/mattermost-server - v11.0.0-alpha.1;github.com/mattermost/mattermost-server - v11.0.0-alpha.1+incompatible;github.com/mattermost/mattermost/server/v8 - v8.0.0-20250815165020-c8d66301415d

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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