Unsanitized JavaScript code injection possible in gatsby-plugin-mdx

Description

The gatsby-plugin-mdx plugin prior to versions 3.15.2 and 2.14.1 passes input through to the gray-matter npm package, which is vulnerable to JavaScript injection in its default configuration, unless input is sanitized.

Recommendation

Update the gatsby-plugin-mdx package to the latest compatible version. Followings are version details:

• Affected version(s): **>= 3.0.0, < 3.15.2

  < 2.14.1**

• Patched version(s): **3.15.2

  2.14.1**

References

• GHSA-mj46-r4gr-5x83
• drive.google.com
• snyk.io
• CVE-2022-25863
• CWE-502
• CAPEC-310
• OWASP 2021-A6
• OWASP 2021-A8

Related Issues

• Finance.js vulnerable to DoS via the IRR function’s depth parameter - CVE-2025-56571
• Mermaid improperly sanitizes sequence diagram labels leading to XSS - CVE-2025-54881
• Payload does not invalidate JWTs after log out (GHSA-5v66-m237-hwf7) - CVE-2025-4643
• Vite's server.fs.deny bypassed with /. for files under project root - CVE-2025-46565

Tags:

npm

gatsby-plugin-mdx