CVE-2025-6465 — Path Traversal in Mattermost Mattermost-server

CWE-22 — Path Traversal5 documents4 sources
Severity
4.3MEDIUMNVD
EPSS
0.1%
top 78.10%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedAug 21
Latest updateAug 29

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NExploitability: 2.8 | Impact: 1.4

Affected Packages4 packages

▶NVDmattermost/mattermost_server10.5.0 — 10.5.9+3
▶Gogithub.com/mattermost_mattermost_server_v8< 8.0.0-20250708173752-d6b35c41f0ae5
▶CVEListV5mattermost/mattermost10.8.0 — 10.8.3+3

🔴Vulnerability Details

4
OSV
Mattermost Fails to Sanitize File Names in github.com/mattermost/mattermost-server↗2025-08-29
▶
GHSA
Mattermost Fails to Sanitize File Names↗2025-08-21
▶
CVEList
Path traversal in image upload with preview overwrite↗2025-08-21
▶
OSV
Mattermost Fails to Sanitize File Names↗2025-08-21
▶
CVE-2025-6465 — Path Traversal | cvebase