Cross-site Scripting in Mermaid

MEDIUM 6.1CVE-2021-35513 · GHSA-4f6x-49g2-99fm · Published 27/06/2021 · updated 17/06/2026

In short

CVE-2021-35513 is a MEDIUM (CVSS 6.1) vulnerability affecting mermaid (mermaid project), mermaid.
Chance of exploitation in the next 30 days (EPSS): 1.0%, higher than 63.5% of all vulnerabilities.
Fix: update to 8.11.0 or later.

Package	Affected versions	Patched versions
mermaid mermaid_project	`< 8.11.0`	`8.11.0`
mermaid npm	`< 8.11.0`	`8.11.0`

Mermaid before 8.11.0 allows XSS when the antiscript feature is used.

NVD description

Mermaid before 8.11.0 allows XSS when the antiscript feature is used.

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Package

Affected versions

Patched versions

< 8.11.0

8.11.0

npm

< 8.11.0

8.11.0

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