CVE-2025-54881 – Mermaid Sequence Diagram Label XSS

CVE ID : CVE-2025-54881

Published : Aug. 19, 2025, 5:15 p.m. | 58 minutes 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. In the default configuration of mermaid 10.9.0-rc.1 to 11.9.0, user supplied input for sequence diagram labels is passed to innerHTML during calculation of element size, causing XSS.

Severity: 5.3 | MEDIUM

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