CVE-2025-10193
Neo4j Cypher MCP server is vulnerable to DNS rebinding
Description
### Impact DNS rebinding vulnerability in Neo4j Cypher MCP server allows malicious websites to bypass Same-Origin Policy protections and execute unauthorised tool invocations against locally running Neo4j MCP instances. The attack relies on the user being enticed to visit a malicious website and spend sufficient time there for DNS rebinding to succeed. ### Patches CORS Middleware added to Cypher MCP server v0.4.0 that blocks all web-based access by default. ### Workarounds If you cannot upgrade to v0.4.0 and above, use stdio mode. ### References [Vendor Advisory](https://neo4j.com/security/cve-2025-10193) https://www.cve.org/CVERecord?id=CVE-2025-10193 Credits We want to publicly recognize the contribution of Evan Harris from [mcpsec.dev](https://mcpsec.dev/) for reporting this issue and following the responsible disclosure [policy](https://neo4j.com/trust-center/responsible-disclosure/).
How to fix CVE-2025-10193
To remediate CVE-2025-10193, upgrade the affected package to a fixed version below.
- —upgrade to 0.4.0 or later
Is CVE-2025-10193 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 0.2.2, < 0.4.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |