CVE-2021-43861

MediumCVSS 5.4/10Last 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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-20 CWE-79

Affected software

Vendor	Product	Versions
mermaid-js	mermaid	< 8.13.8

References

https://github.com/mermaid-js/mermaid/commit/066b7a0d0bda274d94a2f2d21e4323dab5776d83Patch, Third Party Advisory
https://github.com/mermaid-js/mermaid/releases/tag/8.13.8Release Notes, Third Party Advisory
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-p3rp-vmj9-gv6vThird Party Advisory
https://github.com/mermaid-js/mermaid/commit/066b7a0d0bda274d94a2f2d21e4323dab5776d83Patch, Third Party Advisory
https://github.com/mermaid-js/mermaid/releases/tag/8.13.8Release Notes, Third Party Advisory
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-p3rp-vmj9-gv6vThird Party Advisory

Timeline

Published: Dec 30, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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