CVE-2025-13324
December 17, 2025
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 Packages
github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.12.0 <v10.12.2Fix Suggestion:
Update to version v10.12.2github.com/mattermost/mattermost (GO):
Affected version(s) >=v11.0.0-alpha.1 <v11.0.4Fix Suggestion:
Update to version v11.0.4github.com/mattermost/mattermost/server/v8 (GO):
Affected version(s) >=v8.0.0-20230429093631-aac4f2337933 <v8.0.0-20251031095924-e7e23b94e006Fix Suggestion:
Update to version v8.0.0-20251031095924-e7e23b94e006github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.11.0-rc1 <v10.11.5Fix Suggestion:
Update to version v10.11.5Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.04
