CVE-2023-1776

mediumpriority · track · 22EPSS 0.004 · 39 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.45% (39th) EPSS

CVSS 5.4 · medium

Is it mine?

13 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.

cvss

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

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.3

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.1 · impact 5.2

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

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

affected products (13)

Products and version ranges known to be affected.

Mattermost Mattermost≤ 3.3.0 ≤7.1.5enisa_euvdEU
Mattermost Mattermost≤ 3.3.0 ≤7.7.1enisa_euvdEU
Mattermost Mattermost3.3.0 → 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-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/v55.0.0 → 7.1.6osvUSpkg:golang/github.com/mattermost/mattermost-server/v5
Go github.com/mattermost/mattermost-server/v63.3.0 → 7.1.6osvUSpkg:golang/github.com/mattermost/mattermost-server/v6
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-63f2-6959-2pxjMattermost vulnerable to cross-site scripting (XSS)2023-03-31ghsa · osvUS
Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file. [Issue Identifier](https://mattermost.com/security-updates/): MMSA-2023-00139
BIT-mattermost-2023-17762024-03-06vendor · osvUS
Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.

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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+53007 more

references (5)

External citations — patches, advisories, analysis.

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