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Mend.io Vulnerability Database
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CVE-2025-49222
Good to know:
Date: August 21, 2025
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.
Severity Score
Severity Score
Weakness Type (CWE)
Unrestricted Upload of File with Dangerous Type
CWE-434Top Fix
Upgrade Version
Upgrade to version github.com/mattermost/mattermost - v9.11.18;github.com/mattermost/mattermost - v10.5.9;github.com/mattermost/mattermost - v10.8.4;github.com/mattermost/mattermost - v10.9.3;github.com/mattermost/mattermost - v10.10.1;github.com/mattermost/mattermost-server - v10.8.4;github.com/mattermost/mattermost-server - v10.5.9;github.com/mattermost/mattermost-server - v9.11.18;github.com/mattermost/mattermost-server - v10.9.3;github.com/mattermost/mattermost-server - v10.10.1;github.com/mattermost/mattermost-server - v9.11.18+incompatible
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | HIGH |
| User Interaction (UI): | NONE |
| Scope (S): | CHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | NONE |
| Availability (A): | NONE |