CVE-2025-6233: Mattermost Path Traversal vulnerability

July 18, 2025 (updated July 21, 2025)

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.

References

github.com/advisories/GHSA-wvw2-3jh4-4c39
github.com/mattermost/mattermost
github.com/mattermost/mattermost/commit/d38c27f96fcf754c36f231d1f2e9dbd48ad40bab
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-6233

Code Behaviors & Features

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