# CVE-2018-1000820: XML External Entity (XXE) vulnerability in neo4j.procedure:apoc

Source: https://junglewise.ai/threats/cve-2018-1000820-xml-external-entity-xxe-vulnerability-in-neo4j-procedure-apoc  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2018-12-20  
License: CC BY 4.0 with a link back

CVE-2018-1000820 · Severity: low · CVSS 3 · Published 2018-12-20

XML External Entity (XXE) vulnerability in neo4j.procedure:apoc

Technologies: [org.neo4j.procedure:apoc (Maven)](https://junglewise.ai/threats/technologies/org-neo4j-procedure-apoc). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2018-1000820 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2018-1000820 being exploited in the wild.

**How severe is CVE-2018-1000820?** Low severity, with a CVSS score of 3, published 20 December 2018.

**Which products and versions are affected?** org.neo4j.procedure:apoc (Maven) ECOSYSTEM:introduced=0,fixed=3.4.0.4.

**Is there a fix for CVE-2018-1000820?** Yes. org.neo4j.procedure:apoc (Maven): upgrade to 3.4.0.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2018-1000820?** Check whether you run org.neo4j.procedure:apoc (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.neo4j.procedure:apoc (Maven): upgrade to 3.4.0.4 or later

  ```sh
  # set org.neo4j.procedure:apoc to 3.4.0.4 in your pom.xml or build.gradle
  ```


## Affected products

- org.neo4j.procedure:apoc (Maven) ECOSYSTEM:introduced=0,fixed=3.4.0.4

## Identifiers

- CVE-2018-1000820
- GHSA-r2pp-x4mm-4999

## Related threats

- [XML External Entity (XXE) vulnerability in apoc.import.graphml](https://junglewise.ai/threats/xml-external-entity-xxe-vulnerability-in-apoc-import-graphml-e5c72278)
- [org.neo4j.procedure:apoc Path Traversal Vulnerability](https://junglewise.ai/threats/cve-2022-23532-org-neo4j-procedure-apoc-path-traversal-vulnerability)
- [Neo4j Graph apoc plugins Partial Path Traversal Vulnerability](https://junglewise.ai/threats/cve-2022-37423-neo4j-graph-apoc-plugins-partial-path-traversal-vulnerability)
- [Neo4j Graph Database vulnerable to Path Traversal](https://junglewise.ai/threats/cve-2021-42767-neo4j-graph-database-vulnerable-to-path-traversal)