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CVE-2025-54881

CVE-2025-54881 · Mermaid improperly sanitizes of sequence diagram labels leading to XSS

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.3 · Medium · EPSS 0.8% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • mermaid

    Versions
    • >= 10.9.0-rc.1, <= 11.9.0: Affected

    No fix published

  • mermaid npm

    Affected ranges
    • SEMVER: ≥ 11.0.0-alpha.1, < 11.10.0

    Update to 11.10.0

  • mermaid npm

    Affected ranges
    • SEMVER: ≥ 10.9.0-rc.1, < 10.9.4

    Update to 10.9.4

  • node-mermaid Ubuntu:22.04:LTS

    Versions
    • 8.7.0+ds+~cs27.17.17-3
    • 8.13.3+ds+~cs26.13.21-1
    • 8.13.3+ds+~cs26.13.21-2
    • 8.13.8+~cs10.4.16-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-mermaid Ubuntu:26.10

    Versions
    • 9.2.2+~2.0.0-1
    • 9.2.2+~2.0.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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