CVE-2025-6465CWE-22

Path traversal in image upload with preview overwrite

Medium · published August 21, 2025

CVSS v3.1
4.3
EPSS
1%
Percentile
55.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00765 · 55.0th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2025-08-21T17:01Z
EPSS history
Timeline
  • 21 AUG 17:01Z
    Path traversal in image upload with preview overwrite
    cvelistv5