CVE-2025-36530
August 21, 2025
Mattermost versions 10.9.x <= 10.9.1, 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate file paths during plugin import operations which allows restricted admin users to install unauthorized custom plugins via path traversal in the import functionality, bypassing plugin signature enforcement and marketplace restrictions.
Affected Packages
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v9.11.0 <v9.11.18Fix Suggestion:
Update to version v9.11.18github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.9.0 <v10.9.2Fix Suggestion:
Update to version v10.9.2github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.9.0 <v10.9.2Fix Suggestion:
Update to version v10.9.2github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.8.0 <v10.8.4Fix Suggestion:
Update to version v10.8.4github.com/mattermost/mattermost (GO):
Affected version(s) >=v9.11.0 <v9.11.18Fix Suggestion:
Update to version v9.11.18github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.5.0 <v10.5.9Fix Suggestion:
Update to version v10.5.9github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.8.0 <v10.8.4Fix Suggestion:
Update to version v10.8.4github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.5.0 <v10.5.9Fix Suggestion:
Update to version v10.5.9Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
0.05
