CVE-2025-36530
Medium
Description
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.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Mattermost Server
PublishedAug 21, 2025
First seenAug 21, 2025
Weakness typeCWE-22Path traversal
How to fix
Update
- mattermost mattermost_server9.11.18, 10.5.9, 10.8.4, 10.9.2 or later
- github.com/mattermost/mattermost-server10.9.2, 10.8.4, 10.5.9, 9.11.18, 9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.2+incompatible or later
- github.com/mattermost/mattermost/server/v88.0.0-20250619095651-9dd0b3943e55 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 9.11.0 ≤ v < 9.11.18, 10.5.0 ≤ v < 10.5.9, 10.8.0 ≤ v < 10.8.4, 10.9.0 ≤ v < 10.9.2 | 9.11.18, 10.5.9, 10.8.4, 10.9.2 |
| github.com/mattermost/mattermost-serverGo | 10.9.0 ≤ v < 10.9.2, 10.8.0 ≤ v < 10.8.4, 10.5.0 ≤ v < 10.5.9, 9.11.0 ≤ v < 9.11.18, 9.11.0+incompatible ≤ v < 9.11.18+incompatible, 10.5.0+incompatible ≤ v < 10.5.9+incompatible, 10.8.0+incompatible ≤ v < 10.8.4+incompatible, 10.9.0+incompatible ≤ v < 10.9.2+incompatible | 10.9.2, 10.8.4, 10.5.9, 9.11.18, 9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.2+incompatible |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20250619095651-9dd0b3943e55, No range specified | 8.0.0-20250619095651-9dd0b3943e55 |
| github.com/mattermost/mattermost-server/v5Go | v ≤ 5.11.1, No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | v ≤ 6.7.2, No range specified | — |
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