CVE-2022-25863Public exploitNetwork attack vector

Build-server code execution via JavaScript frontmatter

Published Jun 10, 2022 · Updated Sep 17, 2024

JavaScript injection in Gatsby gatsby-plugin-mdx before 2.14.1 and 3.0.0 through 3.15.1 allows remote authenticated users to execute code. The plugin passes MDX frontmatter to gray-matter with its JavaScript engine enabled by default, so JavaScript blocks are evaluated on the build server. Exploitation requires untrusted or unsanitized MDX to enter webpack or GraphQL processing, and injected code runs with the build process's privileges.

CVSS severity8.1
High
EPSS probability1.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

JavaScript injection in Gatsby gatsby-plugin-mdx before 2.14.1 and 3.0.0 through 3.15.1 allows remote authenticated users to execute code. The plugin passes MDX frontmatter to gray-matter with its JavaScript engine enabled by default, so JavaScript blocks are evaluated on the build server. Exploitation requires untrusted or unsanitized MDX to enter webpack or GraphQL processing, and injected code runs with the build process's privileges.

The record

CVE
CVE-2022-25863
Published
Jun 10, 2022
Updated
Sep 17, 2024
Vendor
Gatsby
Product
gatsby-plugin-mdx
Classifications
CWE-502, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0 <unspecified
  2. Affected versionversion=unspecified <2.14.1
  3. Affected versionversion=unspecified <3.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gatsby · gatsby-plugin-mdxversion=3.0.0 <unspecified; version=unspecified <2.14.1; version=unspecified <3.15.2

Published CVSS scores

8.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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