{"id":86958,"date":"2026-04-15T21:41:31","date_gmt":"2026-04-15T21:41:31","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-56406-unauthenticated-access-vulnerability-in-mcp-neo4j-0-3-0","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-56406-unauthenticated-access-vulnerability-in-mcp-neo4j-0-3-0\/","title":{"rendered":"<strong>CVE-2025-56406: Unauthenticated Access Vulnerability in mcp-neo4j 0.3.0<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-56406 vulnerability affects the mcp-neo4j 0.3.0 system, exposing it to potential attacks that can compromise the system or leak data. This vulnerability is significant due to the potential for attackers to execute arbitrary commands or obtain sensitive information via the SSE service, even in the absence of mandatory authentication.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-56406<br \/>\nSeverity: High &#8211; 7.5 CVSS<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: System Compromise or Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p>\n<p>Product | Affected Versions<\/p>\n<p>mcp-neo4j | 0.3.0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The CVE-2025-56406 vulnerability allows an attacker to gain unauthorized access to the mcp-neo4j 0.3.0 system. The vulnerability lies in the lack of authentication required for the MCP servers, giving attackers the ability to execute arbitrary commands or obtain sensitive information through the SSE service.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p>\n<p>An example of how this vulnerability might be exploited could involve a malicious HTTP request, as shown below:<\/p>\n<pre><code class=\"language-http\">GET \/vulnerable\/SSEService HTTP\/1.1\nHost: target.example.com\n{ \"command\": \"execute_arbitrary_command_or_retrieve_sensitive_info\" }<\/code><\/pre>\n<p>In this conceptual example, the attacker sends a GET request to the vulnerable SSE service endpoint. The malicious command provided in the request could result in the execution of an arbitrary command or the retrieval of sensitive information from the server.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-56406 vulnerability affects the mcp-neo4j 0.3.0 system, exposing it to potential attacks that can compromise the system or leak data. This vulnerability is significant due to the potential for attackers to execute arbitrary commands or obtain sensitive information via the SSE service, even in the absence of mandatory authentication. Vulnerability Summary CVE ID: [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86958","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Overview The CVE-2025-56406 vulnerability affects the mcp-neo4j 0.3.0 system, exposing it to potential attacks that can compromise the system or leak data. This vulnerability is significant due to the potential for attackers to execute arbitrary commands or obtain sensitive information via the SSE service, even in the absence of mandatory authentication. 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