CVE-2021-43861

MEDIUM
Published Dec 30, 20214y ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Dec 30, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-20 Improper Input Validation Validation
CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
mermaid_projectmermaid* <8.13.8

References 3

  • github.com https://github.com/mermaid-js/mermaid/commit/066b7a0d0bda274d94a2f2d21e4323dab5776d83
    PatchThird Party Advisory
  • github.com https://github.com/mermaid-js/mermaid/releases/tag/8.13.8
    Release NotesThird Party Advisory
  • github.com https://github.com/mermaid-js/mermaid/security/advisories/GHSA-p3rp-vmj9-gv6v
    Third Party Advisory

Remediation

  • github.com https://github.com/mermaid-js/mermaid/commit/066b7a0d0bda274d94a2f2d21e4323dab5776d83
    PatchThird Party Advisory