Low 3.7Published Dec 17, 2025

CVE-2025-13324Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation

Updated under an hour ago (Oct 28, 2026, 1:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Mattermost
NVD analysis: Analyzed
Record last updated: Dec 24, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Mattermost Mattermost mattermost:mattermost (from the name)	from 10.11.0 through 10.11.5; from 11.0.0 through 11.0.4; from 10.12.0 through 10.12.2; 11.1.0 not affected; 10.11.6 not affected; 11.0.5 not affected; 10.12.3 not affected	CNA record
mattermost mattermost_server mattermost:mattermost_server	from 10.11.0 before 10.11.6; from 10.12.0 before 10.12.3; from 11.0.0 before 11.0.5	NVD

References

References

https://mattermost.com/security-updates	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.