CVE-2025-4128

mediumpriority · track · 17OT risk · elevatedEPSS 0.002 · 13 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.22% (13th) EPSS

CVSS 4.3 · medium

Is it mine?

24 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.

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⚠ sources disagree · low–medium · 3.1–4.3

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.13.1lowAV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

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

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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-863USCWE-863USCWE-863US

affected products (24)

Products and version ranges known to be affected.

Mattermost Mattermost <10.5.5all versionscert_bundDE
Mattermost Mattermost <10.6.4all versionscert_bundDE
Mattermost Mattermost <10.7.2all versionscert_bundDE
Mattermost Mattermost <10.8.0all versionscert_bundDE
Mattermost Mattermost <9.11.14all versionscert_bundDE
Mattermost Mattermost< 10.5.5cert_bundDE
Mattermost Mattermost< 10.6.4cert_bundDE
Mattermost Mattermost< 10.7.2cert_bundDE
Mattermost Mattermost< 10.8.0cert_bundDE
Mattermost Mattermost< 9.11.14cert_bundDE
Mattermost Mattermost≤ 10.5.0 ≤10.5.4enisa_euvdEU
Mattermost Mattermost≤ 9.11.0 ≤9.11.13enisa_euvdEU
Mattermost Mattermostall versionsenisa_euvdEU
Mattermost Inc Mattermost10.5.0 → 10.5.4fstec_bduRU
Mattermost Inc Mattermost9.11.0 → 9.11.13fstec_bduRU
mattermost mattermost server10.5.0 → 10.5.5nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server9.11.0 → 9.11.14nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Go github.com/mattermost/mattermost-server10.5.0 → 10.5.5osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server10.5.0+incompatible → 10.5.5+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server9.11.0 → 9.11.14osvUSpkg:golang/github.com/mattermost/mattermost-server

showing 20 of 24

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1006Mattermost: Mehrere Schwachstellen ermöglichen Offenlegung von InformationenDeutsch2025-05-12csaf · cert_bundDE
Ein authentisierter Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um Informationen offenzulegen.
GHSA-jwhw-xf5v-qgxcMattermost allows guest users to view information about public teams they are not members of2025-06-11ghsa · osvUS
Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.
GO-2025-3757Mattermost allows guest users to view information about public teams they are not members of in github.com/mattermost/mattermost-server2025-06-11vendor · osvUS
Mattermost allows guest users to view information about public teams they are not members of in github.com/mattermost/mattermost-server

also known as (7)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund nvd NVD CVE.org MITRE

published 2025-06-11modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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