CVE-2025-6465

MEDIUM

Mattermost 10.5.0-10.5.8, 10.8.0-10.8.3, 10.9.0-10.9.3, 10.10.0 - Path Traversal & Arbitrary File Write

Title source: llm

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.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0013

EPSS Percentile 31.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-22

Status published

Products (4)

mattermost/mattermost 0 - 8.0.0-20250708173752-d6b35c41f0ae5Go

mattermost/mattermost-server 10.8.0 - 10.8.4Go

mattermost/mattermost_server 10.10.0

mattermost/mattermost_server 10.5.0 - 10.5.9

Published Aug 21, 2025

Tracked Since Feb 18, 2026