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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mattermost Mattermost
Default version status: unaffected
10.8.0 to ≤ 10.8.3affected10.5.0 to ≤ 10.5.8affected10.10.0affected10.9.0 to ≤ 10.9.3affected10.11.0unaffected10.8.4unaffected10.5.9unaffected10.10.1unaffected10.9.4unaffected