CVE-2025-54881

Mermaid improperly sanitizes of sequence diagram labels leading to XSS

CVSS 5.3 MEDIUMEPSS 0.7%CWE-79

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 5.3EPSS 0.7%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

19 ago 2025Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Productos afectados

mermaid-js · mermaid

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Referencias

https://github.com/mermaid-js/mermaid/commit/5c69e5fdb004a6d0a2abe97e23d26e223a059832 https://github.com/mermaid-js/mermaid/commit/685516a85ec1df64cefd4fd15f26533be87d458e https://github.com/mermaid-js/mermaid/security/advisories/GHSA-7rqq-prvp-x9jh