CVE-2023-1774

mediumpriority · track · 22OT risk · elevatedEPSS 0.003 · 25 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.32% (25th) EPSS

CVSS 5.4 · medium

Is it mine?

12 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.

cvss

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

5.4

010

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

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.5

v3.14.2mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Nsecondary · ENISA EU

v3.14.2mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 1.6 · impact 2.5

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Nsecondary · OSV

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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-862USprimaryCWE-862US

affected products (12)

Products and version ranges known to be affected.

Mattermost Mattermost≤ 0 ≤7.1.5enisa_euvdEU
Mattermost Mattermost≤ 0 ≤7.7.1enisa_euvdEU
Mattermost Mattermost0 → 7.8.0enisa_euvdEU
mattermost mattermost server< 7.1.6nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server= 7.7.1nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Bitnami mattermost< 7.1.6osvUSpkg:bitnami/mattermost
Bitnami mattermost= 7.7.1osvUSpkg:bitnami/mattermost
Go github.com/mattermost/mattermost-server3.3.0 → 7.1.6osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server7.1.0 → 7.1.6osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server7.7.0 → 7.7.2osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server/v55.0.0 → 7.1.6osvUSpkg:golang/github.com/mattermost/mattermost-server/v5
Go github.com/mattermost/mattermost-server/v66.0.0 → 7.1.6osvUSpkg:golang/github.com/mattermost/mattermost-server/v6

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0545Mattermost: Mehrere SchwachstellenDeutsch2023-03-01csaf · cert_bundDE
Ein authentisierter Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um Informationen offenzulegen, einen Cross-Site Scripting Angriff durchzuführen und Sicherheitsvorkehrungen zu umgehen.
GHSA-9hj7-v56g-rhf6Mattermost fails to properly authentication inviter's permissions to private channel2023-03-31ghsa · osvUS
When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel. [Issue Identifier](https://mattermost.com/security-updates/): MMSA-2023-00137
BIT-mattermost-2023-17742024-03-06vendor · osvUS
When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd cert_bund NVD CVE.org MITRE

published 2023-03-31modified 2026-06-17

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+11476 more

references (5)

External citations — patches, advisories, analysis.

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