CVE-2025-64641
December 24, 2025
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts
Affected Packages
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v11.1.0 <v11.1.1Fix Suggestion:
Update to version v11.1.1github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.12.0 <v10.12.4Fix Suggestion:
Update to version v10.12.4github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.11.0 <v10.11.8Fix Suggestion:
Update to version v10.11.8github.com/mattermost/mattermost (GO):
Affected version(s) >=v11.0.1-rc1 <v11.0.5Fix Suggestion:
Update to version v11.0.5github.com/mattermost/mattermost (GO):
Affected version(s) =v11.1.0 <v11.1.1Fix Suggestion:
Update to version v11.1.1github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.11.0 <v10.11.8Fix Suggestion:
Update to version v10.11.8github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v11.0.1-rc1 <v11.0.6Fix Suggestion:
Update to version v11.0.6github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.12.0 <v10.12.4Fix Suggestion:
Update to version v10.12.4Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.04
