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TI-2021-13406 Aliases CVE-2021-34371GHSA-pc4w-8v5j-29w9

Neo4j through 3.4.18 (with the shell server enabled) exposes an RMI service that…

Priority MEDIUM 57CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

Neo4j through 3.4.18 (with the shell server enabled) exposes an RMI service that arbitrarily deserializes Java objects, e.g., through setSessionVariable. An attacker can abuse this for remote code execution because there are dependencies with exploitable gadget chains.

Why it matters now

EPSS 0.13386 96th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed org.neo4j:neo4j (Maven): 3.5.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—org.neo4j:neo4j (Maven)before 3.5.03.5.0Patch availableGHSA-pc4w-8v5j-29w9
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • org.neo4j:neo4j (Maven) Vendor— Affected before 3.5.0 Fixed in 3.5.0 Patch available GHSA-pc4w-8v5j-29w9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:neo4j:neo4j:*:*:*:*:community:*:*:*up to 3.4.18Vulnerableneo4j
  • cpe:2.3:a:neo4j:neo4j:*:*:*:*:community:*:*:* Versions up to 3.4.18 Vulnerable ·neo4j

Remediation

  • Fix · GHSA-pc4w-8v5j-29w9 org.neo4j:neo4j (Maven) Fixed in 3.5.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34371
  2. 2026-10-03 Alias added: GHSA-pc4w-8v5j-29w9

References

Exploit 1

Advisory 1

Other 1

  • TI-2018-13005 Due to incorrect access control in Neo4j Enterprise Database Server 3.4.x before 3.4.9… CVSS 3.0CRITICAL 9.8
  • TI-2026-01049 Insufficient escaping of unicode characters in query log CVSS 4.0LOW 1.1
  • TI-2013-05927 Multiple cross-site request forgery (CSRF) vulnerabilities in Neo4J 1.9.2 allow remote… CVSS 2.0MEDIUM 6.8
  • TI-2026-12296 Unathenticated connection can hold Bolt channel open CVSS 4.0MEDIUM 5.5
  • TI-2024-22827 Improper privilege management in Neo4j CVSS 3.1MEDIUM 6.5
  • TI-2026-01192 Incorrect privilege assignment in composite databases CVSS 4.0LOW 2.0
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences