---
id: CVE-2025-13324
title: >-
  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,
  whic…
summary: >-
  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,
  whic…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-863
vendor: mattermost
product: mattermost_server
affected:
  - 'mattermost_server >= 10.11.0, < 10.11.6'
  - 'mattermost_server >= 10.12.0, < 10.12.3'
  - 'mattermost_server >= 11.0.0, < 11.0.5'
patched:
  - mattermost_server 11.0.5
published: '2025-12-17'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T11:10:00.203'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13324'
references:
  - url: 'https://mattermost.com/security-updates'
    label: responsibledisclosure@mattermost.com
tags:
  - nvd
epss: 0.00199
epssPercentile: 0.09075
ingestedAt: '2026-10-13T11:23:51.122Z'
---

## Overview

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.

## Affected

- `mattermost_server >= 10.11.0, < 10.11.6`
- `mattermost_server >= 10.12.0, < 10.12.3`
- `mattermost_server >= 11.0.0, < 11.0.5`

## Remediation

Upgrade past the affected range:

- `mattermost_server 11.0.5`