What is CVE-2025-56406?

CVE-2025-56406 is a high-severity vulnerability in N/a, classified under Command Injection. CVSS score: 7.5/10. Published 2025-09-10.

How severe is CVE-2025-56406?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-56406 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in N/a

CVE-2025-56406

An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.004 (36.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-56406?: CVE-2025-56406 is a high-severity vulnerability in N/a, classified under Command Injection. CVSS score: 7.5/10. Published 2025-09-10.
How severe is CVE-2025-56406?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-56406 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.