CVE-2025-6233: Improper Limitation of a Pathname to a Restricted Directory

Mattermost versions 10.8.x = 10.8.1, 10.7.x = 10.7.3, 10.5.x = 10.5.7, 9.11.x = 9.11.16 fail to sanitize input paths of file attachments in the bulk import JSONL file, which allows a system admin to read arbitrary system files via path traversal...