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CVE-2021-43861

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Date: December 30, 2021

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.

Language: JS

Severity Score

Related Resources (7)

https://github.com/mermaid-js/mermaid/security/advisories/GHSA-p3rp-vmj9-gv6v
https://nvd.nist.gov/vuln/detail/CVE-2021-43861
https://github.com/mermaid-js/mermaid/commit/066b7a0d0bda274d94a2f2d21e4323dab5776d83
https://github.com/mermaid-js/mermaid
https://security-tracker.debian.org/tracker/CVE-2021-43861
https://github.com/mermaid-js/mermaid/releases/tag/8.13.8
https://www.mend.io/vulnerability-database/CVE-2021-43861

Severity Score

Weakness Type (CWE)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-79

Improper Input Validation

CWE-20

Top Fix

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Upgrade Version

Upgrade to version mermaid - 8.13.8;mermaid - 8.13.8

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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