CVE-2025-9079

highpriority · track · 29EPSS 0.006 · 51 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.64% (51st) EPSS

CVSS 7.2 · high

Is it mine?

39 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, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory

cvss

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

8.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 5.9

v3.18highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.18highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · responsibledisclosure@mattermost.comexploitability 1.3 · impact 6

v3.18highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · OSV

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22US

affected products (39)

Products and version ranges known to be affected.

Mattermost Mattermost Servr <10.10.2all versionscert_bundDE
Mattermost Mattermost Servr <10.11.0all versionscert_bundDE
Mattermost Mattermost Servr <10.5.10all versionscert_bundDE
Mattermost Mattermost Servr <10.5.9all versionscert_bundDE
Mattermost Mattermost Servr <10.8.4all versionscert_bundDE
Mattermost Mattermost Servr <10.9.4all versionscert_bundDE
Mattermost Mattermost Servr <10.9.5all versionscert_bundDE
Mattermost Mattermost Servr <9.11.18all versionscert_bundDE
Mattermost Mattermost≤ Servr <10.5.10cert_bundDE
Mattermost Mattermost≤ Servr <10.10.2cert_bundDE
Mattermost Mattermost≤ Servr <10.11.0cert_bundDE
Mattermost Mattermost≤ Servr <10.5.9cert_bundDE
Mattermost Mattermost≤ Servr <10.8.4cert_bundDE
Mattermost Mattermost≤ Servr <10.9.4cert_bundDE
Mattermost Mattermost≤ Servr <10.9.5cert_bundDE
Mattermost Mattermost≤ Servr <9.11.18cert_bundDE
Mattermost Mattermost≤ 10.9.0 ≤10.9.3enisa_euvdEU
Mattermost Mattermost≤ 10.10.0 ≤10.10.1enisa_euvdEU
Mattermost Mattermost≤ 9.11.0 ≤9.11.17enisa_euvdEU
Mattermost Mattermost≤ 10.5.0 ≤10.5.8enisa_euvdEU

showing 20 of 39

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1856Mattermost Server: Mehrere SchwachstellenDeutsch2025-08-17csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mattermost Server ausnutzen, um Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen oder Code auszuführen.
GHSA-qx3f-6vq3-8j8mMattermost Path Traversal vulnerability2025-09-19ghsa · osvUS
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory
GO-2025-3977Mattermost Path Traversal vulnerability in github.com/mattermost/mattermost-server2025-09-24vendor · osvUS
Mattermost Path Traversal vulnerability 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 2025-09-19modified 2026-10-19

references (5)

External citations — patches, advisories, analysis.

scry

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