astro-5.16.3.tgz: 1 vulnerabilities (highest severity is: 5.3)

[mend-bolt-for-github]

Vulnerable Library - astro-5.16.3.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Found in HEAD commit: 9f16425b1ef4dc4fe8f3775df33211142cd70d63

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (astro version)	Remediation Possible**
CVE-2025-66400	Medium	5.3	mdast-util-to-hast-13.0.2.tgz	Transitive	N/A*	❌

*For some transitive vulnerabilities, there is no version of direct dependency with a fix. Check the "Details" section below to see if there is a version of transitive dependency where vulnerability is fixed.

**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation

Details

CVE-2025-66400

Vulnerable Library - mdast-util-to-hast-13.0.2.tgz

Library home page: https://registry.npmjs.org/mdast-util-to-hast/-/mdast-util-to-hast-13.0.2.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• astro-5.16.3.tgz (Root Library)
  • markdown-remark-6.3.9.tgz
    • remark-rehype-11.1.2.tgz
      • ❌ mdast-util-to-hast-13.0.2.tgz (Vulnerable Library)

Found in HEAD commit: 9f16425b1ef4dc4fe8f3775df33211142cd70d63

Found in base branch: main

Vulnerability Details

mdast-util-to-hast is an mdast utility to transform to hast. From 13.0.0 to before 13.2.1, multiple (unprefixed) classnames could be added in markdown source by using character references. This could make rendered user supplied markdown code elements appear like the rest of the page. This vulnerability is fixed in 13.2.1.

Publish Date: 2025-12-01

URL: CVE-2025-66400

CVSS 3 Score Details (5.3)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2025-12-01

Fix Resolution: https://github.com/syntax-tree/mdast-util-to-hast.git - 13.2.1

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