CVE-2025-10193 identifies a DNS rebinding vulnerability in the neo4j-cypher MCP server version 0.2.2. This vulnerability stems from an origin validation error classified under CWE-346, where the server fails to properly verify the origin of incoming requests. DNS rebinding attacks manipulate the victim's browser DNS resolution to bypass the Same-Origin Policy, allowing a malicious website to interact with local services as if they were same-origin. In this case, an attacker can craft a malicious website that, when visited by a user, performs DNS rebinding to redirect requests to the local Neo4j MCP server. This enables unauthorized execution of commands or tool invocations against the local Neo4j instance without authentication. The attack requires the victim to visit and remain on the malicious site long enough for DNS rebinding to complete, which increases attack complexity. The vulnerability impacts confidentiality and integrity by potentially exposing sensitive graph data or allowing unauthorized modifications. The CVSS 4.0 vector indicates network attack vector, high attack complexity, partial user interaction, no privileges required, and high impact on confidentiality and integrity. No patches are currently linked, and no known exploits have been observed in the wild, but the risk remains significant due to the nature of the attack and the critical role of Neo4j in data management.

The vulnerability could allow attackers to bypass browser security restrictions and interact with local Neo4j MCP servers, potentially exposing sensitive graph database information or enabling unauthorized data manipulation. This can lead to data breaches, loss of data integrity, and unauthorized command execution within affected Neo4j instances. Organizations relying on Neo4j for critical data processing or infrastructure management could face operational disruptions or compromise of confidential information. Since the attack requires user interaction via a malicious website, social engineering or phishing campaigns could be used to lure victims. The lack of authentication requirement on the vulnerable service increases risk, as any user visiting the malicious site could trigger the exploit. The impact is particularly severe in environments where Neo4j is exposed internally without adequate network segmentation or where users have high privileges on local machines. Although no active exploits are reported, the vulnerability’s characteristics warrant urgent mitigation to prevent potential exploitation.

1. Immediately restrict access to the neo4j-cypher MCP server to trusted networks only, using firewall rules or network segmentation to prevent exposure to untrusted web content. 2. Employ browser security features such as disabling or limiting DNS rebinding attacks via browser extensions or enterprise policies where possible. 3. Educate users about the risks of visiting untrusted websites and the importance of avoiding suspicious links to reduce the likelihood of user interaction with malicious sites. 4. Monitor network traffic for unusual DNS queries or suspicious patterns indicative of DNS rebinding attempts targeting local Neo4j services. 5. Implement strict origin validation and input sanitization in the Neo4j MCP server once patches become available; until then, consider disabling or limiting MCP server functionality if feasible. 6. Use endpoint security solutions to detect and block unauthorized local service invocations. 7. Regularly update Neo4j software and subscribe to vendor advisories for timely patch deployment once fixes are released. 8. Consider deploying web application firewalls (WAFs) or reverse proxies that can enforce origin checks and block suspicious requests to local services.