What is CVE-2025-13324?

CVE-2025-13324 is a low-severity vulnerability in Mattermost, classified under Incorrect Authorization. CVSS score: 3.7/10. Published 2025-12-17.

How severe is CVE-2025-13324?

Low severity. CVSS v3 base score is 3.7 out of 10.

Auth bypass in Mattermost

CVE-2025-13324

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.

Vulnerability class: Broken Access Control

EPSS: 0.002 (7.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Mattermost — versions 10.11.0, 11.0.0, 10.12.0
Mattermost Mattermost_server

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-13324?: CVE-2025-13324 is a low-severity vulnerability in Mattermost, classified under Incorrect Authorization. CVSS score: 3.7/10. Published 2025-12-17.
How severe is CVE-2025-13324?: Low severity. CVSS v3 base score is 3.7 out of 10.