CVE-2025-8023

Path Traversal in Template Upload Allows Uploading Files Outside Target Directory

State: Published
Severity: 6.8 Medium
Published: Aug 21, 2025
Updated: Aug 21, 2025
Reserved: Jul 22, 2025

Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N	Mattermost

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
MattermostMattermost	10.8.0 through 10.8.3Affected 10.5.0 through 10.5.8Affected 9.11.0 through 9.11.17Affected 10.9.0 through 10.9.2Affected 10.10.0Not affected 10.8.4Not affected 10.5.9Not affected 9.11.18Not affected 10.9.3Not affected

References

https://mattermost.com/security-updates

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