# CVE-2021-34371: Deserialization of Untrusted Data in Neo4j

Source: https://junglewise.ai/threats/cve-2021-34371-deserialization-of-untrusted-data-in-neo4j  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-09-01  
License: CC BY 4.0 with a link back

CVE-2021-34371 · Severity: low · CVSS 3.1 · Published 2021-09-01

Deserialization of Untrusted Data in Neo4j

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

## Quick answers

**Is CVE-2021-34371 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-34371 being exploited in the wild.

**How severe is CVE-2021-34371?** Low severity, with a CVSS score of 3.1, published 1 September 2021.

**Which products and versions are affected?** org.neo4j:neo4j (Maven) ECOSYSTEM:introduced=0,fixed=3.5.0.

**Is there a fix for CVE-2021-34371?** Yes. org.neo4j:neo4j (Maven): upgrade to 3.5.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-34371?** Check whether you run org.neo4j:neo4j (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:neo4j (Maven): upgrade to 3.5.0 or later

  ```sh
  # set org.neo4j:neo4j to 3.5.0 in your pom.xml or build.gradle
  ```


## Affected products

- org.neo4j:neo4j (Maven) ECOSYSTEM:introduced=0,fixed=3.5.0

## Identifiers

- CVE-2021-34371
- GHSA-pc4w-8v5j-29w9

## Related threats

- [Neo4j Enterprise and Community log injection via unescaped metadata](https://junglewise.ai/threats/cve-2026-1337-neo4j-enterprise-and-community-log-injection-via-unescaped)
- [Neo4j Enterprise and Community vulnerable to a potential information disclosure](https://junglewise.ai/threats/cve-2026-1622-neo4j-enterprise-and-community-vulnerable-to-a-potential)
- [Neo4J vulnerable to Cross-Site Request Forgery](https://junglewise.ai/threats/cve-2013-7259-neo4j-vulnerable-to-cross-site-request-forgery)