CVE-2023-27266

lowpriority · track · 11EPSS 0.005 · 44 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.53% (44th) EPSS

CVSS 2.7 · low

Is it mine?

4 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.

cvss

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

2.7

010

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

v3.12.7lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 1.2 · impact 1.4

v3.12.7lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.12.7lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 1.2 · impact 1.4

v3.12.5lowCVSS:3.1/AV:N/AC:L/PR:H/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-200USprimary

affected products (4)

Products and version ranges known to be affected.

Mattermost Mattermostall versionscert_bundDEcpe:/a:mattermost:mattermost_server:-
Mattermost Mattermost5.12.0 → 7.7.0enisa_euvdEU
mattermost mattermost server5.12.0 → 7.7.0nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Bitnami mattermost5.12.0 → 7.7.0osvUSpkg:bitnami/mattermost

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0490Mattermost: Mehrere SchwachstellenDeutsch2023-02-27csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um Informationen offenzulegen und Daten zu manipulieren.
BIT-mattermost-2023-272662024-03-06vendor · osvUS
Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2023-02-27modified 2026-06-17

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+19425 more

references (4)

External citations — patches, advisories, analysis.

scry

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