CVE-2025-6465

Path traversal in image upload with preview overwrite

State: Published
Severity: 4.3 Medium
Published: Aug 21, 2025
Updated: Aug 21, 2025
Reserved: Jun 21, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 10.10.0Affected 10.9.0 through 10.9.3Affected 10.11.0Not affected 10.8.4Not affected 10.5.9Not affected 10.10.1Not affected 10.9.4Not affected

References

https://mattermost.com/security-updates

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.