Low severity · published Dec 17, 2025
CVE-2025-13324
Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation
3.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.11.0 through 10.11.5; 11.0.0 through 11.0.4; 10.12.0 through 10.12.2 · source: vendor
MS
Mattermost Server · Mattermost
10.11.0 before 10.11.6; 10.12.0 before 10.12.3; 11.0.0 before 11.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13324
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-13324
Vendor Advisory
https://mattermost.com/security-updates
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