CVE-2025-9081

mediumpriority · track · 26EPSS 0.003 · 20 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (20th) EPSS

CVSS 6.5 · medium

Is it mine?

29 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration

cvss

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

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.1–6.5

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 1.6 · impact 1.4

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-639USCWE-639US

affected products (29)

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≤ 9.11.0 ≤9.11.17enisa_euvdEU
Mattermost Mattermostall versionsenisa_euvdEU
Mattermost Mattermost≤ 10.5.0 ≤10.5.8enisa_euvdEU
mattermost mattermost server10.5.0 → 10.5.9nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

showing 20 of 29

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-f72g-52v7-mg3pMattermost boards plugin fails to restrict download access to files2025-09-19ghsa · osvUS
Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration
GO-2025-3978Mattermost boards plugin fails to restrict download access to files in github.com/mattermost/mattermost-plugin-boards2025-09-24vendor · osvUS
Mattermost boards plugin fails to restrict download access to files in github.com/mattermost/mattermost-plugin-boards

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 NVD CVE.org MITRE

published 2025-09-19modified 2026-10-19

references (5)

External citations — patches, advisories, analysis.

scry

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