CVE-2025-54880
Medium
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 11.9.0 and earlier, user supplied input for architecture diagram icons is passed to the d3 html() method, creating a sink for cross site scripting. This vulnerability is fixed in 11.10.0.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Mermaid
PublishedAug 19, 2025
First seenAug 19, 2025
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- mermaid_project mermaid11.10.0 or later
- mermaid11.10.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mermaid_project mermaid | 11.1.0 ≤ v < 11.10.0 | 11.10.0 |
| mermaidnpm | 11.1.0 ≤ v < 11.10.0 | 11.10.0 |
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