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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2025-54881

Mermaid improperly sanitizes of sequence diagram labels leading to XSS

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

mermaid-js mermaid

  • >= 10.9.0-rc.1, <= 11.9.0affected

References