CVE-2021-43861

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CVSS 3.1

5.4 medium

EPSS

<1%p58

Published

Dec 30, 2021 (Dec 30, 2021)

Modified

Jun 17, 2026

Description

Mermaid is a Javascript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. Prior to version 8.13.8, malicious diagrams can run javascript code at diagram readers' machines. Users should upgrade to version 8.13.8 to receive a patch. There are no known workarounds aside from upgrading.

Vendors: mermaid project
Products: mermaid
Weakness: CWE-20, CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.9%)

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