CVE-2022-25863

Name of the Vulnerable Software and Affected Versions gatsby-plugin-mdx versions 3.0.0 through 3.15.1 gatsby-plugin-mdx versions 2.14.0 and earlier

Description The gatsby-plugin-mdx plugin is 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. This vulnerability can be exploited 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). The injected JavaScript executes in the context of the build server. To exploit this vulnerability, untrusted/unsanitized input would need to be sourced or added into an MDX file.

Recommendations For gatsby-plugin-mdx versions 3.0.0 through 3.15.1, update to version 3.15.2 or later. For gatsby-plugin-mdx versions 2.14.0 and earlier, update to version 2.14.1 or later. If an older version of gatsby-plugin-mdx must be used, input passed into the plugin should be sanitized ahead of processing. As a temporary workaround, consider disabling the JSFrontmatterEngine option to mitigate the risk of exploitation.