Vulnerability DatabaseCVE-2025-8402
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CVE-2025-8402
August 21, 2025
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.
Affected Packages
https://github.com/mattermost/mattermost.git (GITHUB):
Affected version(s) >=v10.5.0 <v10.5.9
Fix Suggestion:
Update to version v10.5.9
https://github.com/mattermost/mattermost.git (GITHUB):
Affected version(s) =v10.10.0 <v10.10.1
Fix Suggestion:
Update to version v10.10.1
https://github.com/mattermost/mattermost.git (GITHUB):
Affected version(s) >=v10.8.0 <v10.8.4
Fix Suggestion:
Update to version v10.8.4
https://github.com/mattermost/mattermost.git (GITHUB):
Affected version(s) >=v10.9.0 <v10.9.4
Fix Suggestion:
Update to version v10.9.4
https://github.com/mattermost/mattermost.git (GITHUB):
Affected version(s) >=v9.11.0 <v9.11.18
Fix Suggestion:
Update to version v9.11.18
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v9.11.0 <v9.11.18
Fix Suggestion:
Update to version v9.11.18
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.8.0 <v10.8.4
Fix Suggestion:
Update to version v10.8.4
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.9.0 <v10.9.4
Fix Suggestion:
Update to version v10.9.4
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.10.0 <v10.10.1
Fix Suggestion:
Update to version v10.10.1
github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.5.0 <v10.5.9
Fix Suggestion:
Update to version v10.5.9
Related Resources (5)
https://nvd.nist.gov/vuln/detail/CVE-2025-8402
https://github.com/advisories/GHSA-h469-4fcf-p23h
https://mattermost.com/security-updates
https://pkg.go.dev/vuln/GO-2025-3911
https://github.com/mattermost/mattermost
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.9
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Validation of Specified Type of Input
CWE-1287
NULL Pointer Dereference
CWE-476
EPSS
Base Score:
0.11