CVE-2018-1000820: XML External Entity (XXE) vulnerability in org.neo4j.procedure:apoc
Summary
CVE-2018-1000820: XML External Entity (XXE) vulnerability in neo4j.procedure:apoc. Affects org.neo4j.procedure:apoc versions < 3.4.0.4. Fixed in 3.4.0.4. How to fix ↓
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Background
org.neo4j.procedure:apoc is a Maven package that provides additional procedures for Neo4j, a graph database management system. These procedures enhance the functionality of Neo4j by adding new capabilities. However, versions of neo4j-apoc-procedures prior to commit 45bc09c are vulnerable to an XML External Entity (XXE) vulnerability in the XML Parser. This vulnerability can lead to the disclosure of confidential data, denial of service, SSRF, and port scanning.
Vulnerability Detail
The XML External Entity (XXE) vulnerability in org.neo4j.procedure:apoc allows an attacker to exploit the XML Parser, potentially resulting in the disclosure of sensitive information, denial of service attacks, server-side request forgery (SSRF), and port scanning. This vulnerability has a CVSS score of 10.0, indicating its critical severity. It has been fixed in versions after commit 45bc09c.
How To Fix
Latest published version: 4.4.0.40 as of 22 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
3.4.0.4
This is the first release that contains the fix.
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Workaround
There is no known workaround for this vulnerability. It is essential to update to a fixed version of org.neo4j.procedure:apoc to mitigate the risk.
Conclusion
The XML External Entity (XXE) vulnerability in org.neo4j.procedure:apoc poses a significant risk to the security and functionality of the affected application. It is crucial to update to a fixed version of the package (3.4.0.4 or later) to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
org.neo4j.procedure:apoc is a Maven package that provides additional procedures for Neo4j, a graph database management system. These procedures enhance the functionality of Neo4j by adding new capabilities.
An XML External Entity (XXE) vulnerability is a type of security vulnerability that allows an attacker to exploit an XML parser by including external entities or files. This can lead to the disclosure of sensitive information, denial of service attacks, server-side request forgery (SSRF), and port scanning.
The potential consequences of this vulnerability include the disclosure of confidential data, denial of service attacks, server-side request forgery (SSRF), and port scanning. These can have severe impacts on the security and functionality of the affected application.
To fix this vulnerability, update the org.neo4j.procedure:apoc package to version 3.4.0.4 or later. This can be done by updating the package version in the project's Maven configuration file (pom.xml) and rebuilding the project.
No, there is no known workaround for this vulnerability. It is crucial to update to a fixed version of org.neo4j.procedure:apoc to mitigate the risk.
References
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