CVE-2025-6465

EUVD-2025-25460
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
MattermostCNA
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 31%
Affected Products (NVD)
VendorProductVersion
mattermostmattermost_server
10.5.0 ≤
𝑥
< 10.5.9
mattermostmattermost_server
10.8.0 ≤
𝑥
< 10.8.4
mattermostmattermost_server
10.9.0 ≤
𝑥
< 10.9.4
mattermostmattermost_server
10.10.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mattermostmattermost
10.8.0 ≤
𝑥
≤ 10.8.3
CNA
mattermostmattermost
10.5.0 ≤
𝑥
≤ 10.5.8
CNA
mattermostmattermost
10.10.0
CNA
mattermostmattermost
10.9.0 ≤
𝑥
≤ 10.9.3
CNA
Common Weakness Enumeration
References
https://mattermost.com/security-updates