{"id":"CVE-2022-25863","aliases":["EUVD-2022-6094","GHSA-mj46-r4gr-5x83","SNYK-JS-GATSBYPLUGINMDX-2405699"],"status":"published","title":"Deserialization of Untrusted Data","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.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01992,"percentile":0.80847,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-502"],"published":"2022-06-03T22:32:06Z","modified":"2026-10-28T02:30:40Z","fixes":[{"ecosystem":"npm","package":"gatsby-plugin-mdx","fixed_in":["2.14.1","3.15.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"gatsby-plugin-mdx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.1"}]}]},{"source":"ghsa","ecosystem":"npm","package":"gatsby-plugin-mdx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.15.2"}]}]},{"source":"osv","ecosystem":"npm","package":"gatsby-plugin-mdx","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.14.1"}]}]},{"source":"osv","ecosystem":"npm","package":"gatsby-plugin-mdx","ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"3.15.2"}]}]}],"products":[{"vendor":"gatsbyjs","product":"gatsby-plugin-mdx"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-GATSBYPLUGINMDX-2405699","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","advisory","web"]},{"url":"https://drive.google.com/file/d/1EoCzbwTWOM8-fjvwMbH3bqcZ2iKksxTW/view?usp=sharing","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://github.com/gatsbyjs/gatsby/pull/35830","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/gatsbyjs/gatsby/pull/35830/commits/f214eb0694c61e348b2751cecd1aace2046bc46e","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","web"]},{"url":"https://github.com/gatsbyjs/gatsby/security/advisories/GHSA-mj46-r4gr-5x83","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-25863","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mj46-r4gr-5x83"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/25xxx/CVE-2022-25863.json","tags":["advisory"]},{"url":"https://github.com/gatsbyjs/gatsby","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-25863","title":"Deserialization of Untrusted Data","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.","status":"published","published":"2022-06-10T20:00:19.275Z","modified":"2024-09-17T00:31:34.621Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:34:28.374916Z"}],"euvd":[{"id":"EUVD-2022-6094","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.","status":"published","published":"2022-06-10T20:00:19Z","modified":"2024-09-17T00:31:34Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P","level":"high"}],"updated_at":"2026-11-03T00:28:58.42254Z"}],"ghsa":[{"id":"GHSA-mj46-r4gr-5x83","title":"Unsanitized JavaScript code injection possible in gatsby-plugin-mdx","description":"### Impact\nThe 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.  The vulnerability is present when passing input in both webpack (MDX files in `src/pages` or MDX file imported as component in frontend / React code) and data mode (querying MDX nodes via GraphQL).  Injected JavaScript executes in the context of the build server.\n\nTo exploit this vulnerability untrusted/unsanitized input would need to be sourced or added into an MDX file.  The following MDX payload demonstrates a vulnerable configuration:\n```\n---js\n((require(\"child_process\")).execSync(\"id \u003e\u003e /tmp/rce\"))\n--- \n```\n\n### Patches\nA patch has been introduced in `gatsby-plugin-mdx@3.15.2` and `gatsby-plugin-mdx@2.14.1` which mitigates the issue by disabling the `gray-matter` JavaScript Frontmatter engine.  The patch introduces a new option, `JSFrontmatterEngine` which is set to `false` by default.  When setting `JSFrontmatterEngine` to `true`, input passed to `gatsby-plugin-mdx` must be sanitized before processing to avoid a security risk.  Warnings are displayed when enabling `JSFrontmatterEngine` to `true` or if it appears that the MDX input is attempting to use the Frontmatter engine.\n\n### Workarounds\nIf an older version of `gatsby-plugin-mdx` must be used, input passed into the plugin should be sanitized ahead of processing.\n\n**We encourage projects to upgrade to the latest major release branch for all Gatsby plugins to ensure the latest security updates and bug fixes are received in a timely manner.**\n\n### Credits\nWe would like to thank Snyk [snyk.io] for initially bringing the issue to our attention, as well as Feng Xiao and Zhongfu Su, who reported the issue to Snyk.\n\n### For more information\nEmail us at [security@gatsbyjs.com](mailto:security@gatsbyjs.com).\n","status":"published","published":"2022-06-03T22:32:06Z","modified":"2023-01-27T05:03:23Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:36:20.144464Z"}],"nvd":[{"id":"CVE-2022-25863","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.","status":"published","published":"2022-06-10T20:15:08.227Z","modified":"2026-09-29T15:50:31.907Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:07:21.62951Z"}],"osv":[{"id":"CVE-2022-25863","title":"Deserialization of Untrusted Data","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.","status":"published","published":"2022-06-10T20:00:19.275Z","modified":"2026-10-28T02:30:40.415785107Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P","level":"high"}],"updated_at":"2026-11-02T15:44:24.758293Z"},{"id":"GHSA-mj46-r4gr-5x83","title":"Unsanitized JavaScript code injection possible in gatsby-plugin-mdx","description":"### Impact\nThe 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.  The vulnerability is present when passing input in both webpack (MDX files in `src/pages` or MDX file imported as component in frontend / React code) and data mode (querying MDX nodes via GraphQL).  Injected JavaScript executes in the context of the build server.\n\nTo exploit this vulnerability untrusted/unsanitized input would need to be sourced or added into an MDX file.  The following MDX payload demonstrates a vulnerable configuration:\n```\n---js\n((require(\"child_process\")).execSync(\"id \u003e\u003e /tmp/rce\"))\n--- \n```\n\n### Patches\nA patch has been introduced in `gatsby-plugin-mdx@3.15.2` and `gatsby-plugin-mdx@2.14.1` which mitigates the issue by disabling the `gray-matter` JavaScript Frontmatter engine.  The patch introduces a new option, `JSFrontmatterEngine` which is set to `false` by default.  When setting `JSFrontmatterEngine` to `true`, input passed to `gatsby-plugin-mdx` must be sanitized before processing to avoid a security risk.  Warnings are displayed when enabling `JSFrontmatterEngine` to `true` or if it appears that the MDX input is attempting to use the Frontmatter engine.\n\n### Workarounds\nIf an older version of `gatsby-plugin-mdx` must be used, input passed into the plugin should be sanitized ahead of processing.\n\n**We encourage projects to upgrade to the latest major release branch for all Gatsby plugins to ensure the latest security updates and bug fixes are received in a timely manner.**\n\n### Credits\nWe would like to thank Snyk [snyk.io] for initially bringing the issue to our attention, as well as Feng Xiao and Zhongfu Su, who reported the issue to Snyk.\n\n### For more information\nEmail us at [security@gatsbyjs.com](mailto:security@gatsbyjs.com).\n","status":"published","published":"2022-06-03T22:32:06Z","modified":"2026-07-08T06:50:01.480369243Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:46:51.811331Z"}]}}