MEDIUM 6.8 Go
Mattermost Fails to Validate File Paths
GHSA-gq3r-5833-5532 · CVE-2025-36530 · GO-2025-3901
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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.
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