CVE-2023-1777

mediumpriority · track · 21EPSS 0.005 · 45 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.54% (45th) EPSS

CVSS 5.3 · medium

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

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

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.8 · impact 3.6

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · OSV

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/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-668USprimaryCWE-200USCWE-668US

affected products (15)

Products and version ranges known to be affected.

Mattermost Mattermost≤ 6.3.0 ≤7.1.5enisa_euvdEU
Mattermost Mattermost≤ 6.3.0 ≤7.8.0enisa_euvdEU
Mattermost Mattermost≤ 6.3.0 ≤7.7.1enisa_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:*:*:*:*:*:*:*:*
mattermost mattermost server= 7.8.0nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Bitnami mattermost< 7.1.6osvUSpkg:bitnami/mattermost
Bitnami mattermost= 7.7.1osvUSpkg:bitnami/mattermost
Bitnami mattermost= 7.8.0osvUSpkg:bitnami/mattermost
Go github.com/mattermost/mattermost-server1.4.1-0.20211025164829-f7a8147b825c → 1.4.1-0.20230301145909-10be118d99a5osvUSpkg: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-server7.8.0 → 7.8.1osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server/v66.0.0-20211025164829-f7a8147b825c → 6.0.0-20230301145909-10be118d99a5osvUSpkg:golang/github.com/mattermost/mattermost-server/v6
Go github.com/mattermost/mattermost-server/v66.3.0 → 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-3wq5-3f56-v5xcMattermost vulnerable to information disclosure2023-03-31ghsa · osvUS
Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.
BIT-mattermost-2023-17772024-03-06vendor · osvUS
Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

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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+944 more

references (5)

External citations — patches, advisories, analysis.

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