MEDIUM 4.3 Go
Mattermost Fails to Sanitize File Names
GHSA-pj6f-rc94-gw53 · CVE-2025-6465 · GO-2025-3910
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Description
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to sanitize file names which allows users with file upload permission to overwrite file attachment thumbnails via path traversal in file streaming APIs.
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