CVE-2023-3593

mediumpriority · track · 26EPSS 0.006 · 49 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.61% (49th) EPSS

CVSS 6.5 · medium

Is it mine?

9 products

Who says so?

5 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

Mattermost fails to properly validate markdown, allowing an attacker to crash the server via a specially crafted markdown input.

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

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

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

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · responsibledisclosure@mattermost.comexploitability 2.8 · impact 1.4

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

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

Trackcoordinatorcisa_ssvcUS

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Mattermost Mattermost≤ 0 ≤7.9.4enisa_euvdEU
Mattermost Mattermost≤ 0 ≤7.8.6enisa_euvdEU
Mattermost Mattermost≤ 0 ≤7.10.2enisa_euvdEU
mattermost mattermost server7.10.0 → 7.10.3nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server7.8.0 → 7.8.7nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server7.9.0 → 7.9.5nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Bitnami mattermost7.10.0 → 7.10.3osvUSpkg:bitnami/mattermost
Bitnami mattermost7.8.0 → 7.8.7osvUSpkg:bitnami/mattermost
Bitnami mattermost7.9.0 → 7.9.5osvUSpkg:bitnami/mattermost

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1486Mattermost: Mehrere SchwachstellenDeutsch2023-06-15csaf · cert_bundDE
Ein entfernter anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um einen Denial-of-Service-Zustand auszulösen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen und Daten zu manipulieren.
BIT-mattermost-2023-35932024-03-06vendor · osvUS
Mattermost fails to properly validate markdown, allowing an attacker to crash the server via a specially crafted markdown input.

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 2023-07-17modified 2026-06-17

External citations — patches, advisories, analysis.

scry

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