CVE-2025-13324
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-17

Last updated on: 2025-12-29

Assigner: Mattermost, Inc.

Description
Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.
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Meta Information
Published
2025-12-17
Last Modified
2025-12-29
Generated
2026-06-16
AI Q&A
2025-12-17
EPSS Evaluated
2026-06-14
NVD
CVE-2025-13324
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
mattermost mattermost_server From 10.11.0 (inc) to 10.11.6 (exc)
mattermost mattermost_server From 10.12.0 (inc) to 10.12.3 (exc)
mattermost mattermost_server From 11.0.0 (inc) to 11.0.5 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

This vulnerability exists in certain versions of Mattermost where invite tokens are not invalidated after being used. This flaw allows attackers who have intercepted these invite tokens to reuse them (token replay attack) to manipulate channel memberships, such as adding or removing users from private channels.

Impact Analysis

The vulnerability can impact you by allowing unauthorized manipulation of private channel memberships. Malicious actors could add or remove users from private channels without permission, potentially leading to unauthorized access to sensitive communications or exclusion of legitimate users.

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