CVE-2021-34371: NEO4J

Critical severity, CVSS 9.8. EPSS: 13.4% chance of exploitation in the next 30 days.

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.

Affected products

• NEO4J NEO4J: up to and including 3.4.18

Published 2021-08-05. Last modified 2026-06-17.