CVE-2023-6202

mediumpriority · track · 17EPSS 0.004 · 38 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.44% (38th) EPSS

CVSS 4.3 · medium

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

Mattermost fails to perform proper authorization in the /plugins/focalboard/api/v2/users endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.

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:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

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

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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: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-284USCWE-284US

affected products (10)

Products and version ranges known to be affected.

Mattermost Mattermost≤ 0 ≤9.0.1enisa_euvdEU
Mattermost Mattermost≤ 0 ≤9.1.0enisa_euvdEU
Mattermost Mattermost≤ 0 ≤7.8.12enisa_euvdEU
Mattermost Mattermost≤ 0 ≤8.1.3enisa_euvdEU
mattermost mattermost≤ 7.8.12nvdUScpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
mattermost mattermost8.0.0 → 8.1.3nvdUScpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
Go github.com/mattermost/mattermost-server/v6< 7.8.13osvUSpkg:golang/github.com/mattermost/mattermost-server/v6
Go github.com/mattermost/mattermost/server/v8< 8.1.4osvUSpkg:golang/github.com/mattermost/mattermost/server/v8
Go github.com/mattermost/mattermost/server/v89.0.0 → 9.0.2osvUSpkg:golang/github.com/mattermost/mattermost/server/v8
Go github.com/mattermost/mattermost/server/v89.1.0 → 9.1.1osvUSpkg:golang/github.com/mattermost/mattermost/server/v8

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2763Mattermost: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2023-10-29csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
GHSA-85jj-c9jr-9jhxMattermost Improper Access Control vulnerability2023-11-27ghsa · osvUS
Mattermost fails to perform proper authorization in the `/plugins/focalboard/api/v2/users` endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv cert_bund NVD CVE.org MITRE

published 2023-11-27modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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