The package gatsby-plugin-mdx before 2.14.1, from 3.0.0 and before 3.15.2 are vulnerable to Deserialization of Untrusted Data when passing input through to the gray-matter package, due to its default configurations that are missing input sanitization. Exploiting this vulnerability is possible when passing input in both webpack (MDX files in src/pages or MDX file imported as a component in frontend / React code) and data mode (querying MDX nodes via GraphQL). Workaround: If an older version of gatsby-plugin-mdx must be used, input passed into the plugin should be sanitized ahead of processing.
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gatsby | Gatsbyjs | * | 2.14.1 (excluding) |
| Gatsby | Gatsbyjs | 3.0.0 (including) | 3.15.2 (excluding) |