What’s Vulnerable › Vulnerabilities

CVE-2021-34371

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-05 · updated 2026-06-17
• Weakness: CWE-502

Description

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: through 3.4.18

References

• https://www.exploit-db.com/exploits/50170
• https://www.exploit-db.com/exploits/50170

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