CVE-2025-54881: Mermaid improperly sanitizes sequence diagram labels leading to XSS
(updated )
In the default configuration of mermaid 11.9.0, user supplied input for sequence diagram labels is passed to innerHTML during calculation of element size, causing XSS.
References
- github.com/advisories/GHSA-7rqq-prvp-x9jh
- github.com/mermaid-js/mermaid
- github.com/mermaid-js/mermaid/commit/5c69e5fdb004a6d0a2abe97e23d26e223a059832
- github.com/mermaid-js/mermaid/commit/685516a85ec1df64cefd4fd15f26533be87d458e
- github.com/mermaid-js/mermaid/security/advisories/GHSA-7rqq-prvp-x9jh
- nvd.nist.gov/vuln/detail/CVE-2025-54881
Code Behaviors & Features
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