CVE-2025-13324 Details
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.
A vulnerability exists in Mattermost versions 10.11.x prior to 10.11.5, 11.0.x prior to 11.0.4, and 10.12.x prior to 10.12.2. These versions fail to invalidate invite tokens after they have been used, which can allow malicious actors who have intercepted these tokens to manipulate channel memberships. This includes the ability to add or remove users from private channels by replaying the tokens.
Users can upgrade to Mattermost versions 11.1.0, 11.1.4, or 10.12.3 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Dec 17, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://mattermost.com/security-updates | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mattermost mattermost server | >= 10.11.0, < 10.11.6 >= 10.12.0, < 10.12.3 >= 11.0.0, < 11.0.5 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 29, 2025 | Initial Analysis | [email protected] |
| Dec 24, 2025 | CVE Modified | [email protected] |
| Dec 17, 2025 | New CVE Received | [email protected] |