CVE-2025-8023

mediumpriority · track · 20EPSS 0.004 · 35 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.41% (35th) EPSS

CVSS 4.9 · medium

Is it mine?

42 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, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.

cvss

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

6.8

010

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

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 1.2 · impact 3.6

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.3 · impact 4

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:Nsecondary · OSV

v3.14.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/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 (42)

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 42

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-x67c-v8jr-p29rMattermost Fails to Sanitize Path Traversal Sequences2025-08-21ghsa · osvUS
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.
GO-2025-3907Mattermost Fails to Sanitize Path Traversal Sequences in github.com/mattermost/mattermost-server2025-08-29vendor · osvUS
Mattermost Fails to Sanitize Path Traversal Sequences in github.com/mattermost/mattermost-server

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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