CVE-2025-6465

mediumpriority · track · 0EPSS 0.008 · 55 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.77% (55th) EPSS

CVSS 4.3 · medium

Is it mine?

41 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22US

affected products (41)

Products and version ranges known to be affected.

Mattermost Mattermost Plugins <10.5.9all versionscert_bundDE
Mattermost Mattermost Server <10.10.0all versionscert_bundDE
Mattermost Mattermost Server <10.10.1all versionscert_bundDE
Mattermost Mattermost Server <10.11.0all versionscert_bundDE
Mattermost Mattermost Server <10.5.9all versionscert_bundDE
Mattermost Mattermost Server <10.8.4all versionscert_bundDE
Mattermost Mattermost Server <10.9.2all versionscert_bundDE
Mattermost Mattermost Server <10.9.3all versionscert_bundDE
Mattermost Mattermost Server <10.9.4all versionscert_bundDE
Mattermost Mattermost Server <9.11.18all versionscert_bundDE
Mattermost Mattermost≤ Server <9.11.18cert_bundDE
Mattermost Mattermost≤ Plugins <10.5.9cert_bundDE
Mattermost Mattermost≤ Server <10.10.0cert_bundDE
Mattermost Mattermost≤ Server <10.10.1cert_bundDE
Mattermost Mattermost≤ Server <10.11.0cert_bundDE
Mattermost Mattermost≤ Server <10.5.9cert_bundDE
Mattermost Mattermost≤ Server <10.8.4cert_bundDE
Mattermost Mattermost≤ Server <10.9.2cert_bundDE
Mattermost Mattermost≤ Server <10.9.3cert_bundDE
Mattermost Mattermost≤ Server <10.9.4cert_bundDE

showing 20 of 41

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1625Mattermost Server und Plugins: Mehrere SchwachstellenDeutsch2025-07-22csaf · cert_bundDE
Ein authentifizierter Angreifer mit bestimmten Berechtigungen kann diese Schwachstellen ausnutzen, um Sicherheitsmechanismen zu umgehen, beliebige Dateien in das Dateisystem einzubringen und potenziell beliebigen Code auszuführen.
GHSA-pj6f-rc94-gw53Mattermost Fails to Sanitize File Names2025-08-21ghsa · osvUS
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.
GO-2025-3910Mattermost Fails to Sanitize File Names in github.com/mattermost/mattermost-server2025-08-29vendor · osvUS
Mattermost Fails to Sanitize File Names in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/mattermost/mattermost/server/v8 before v8.0.0-20250708173752-d6b35c41f0ae5.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund NVD CVE.org MITRE

published 2025-08-21modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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