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CVE-2025-56404: Security Vulnerability in MariaDB MCP 0.1.0 via SSE Service

Overview

This report presents a comprehensive analysis of the vulnerability identified as CVE-2025-56404. This vulnerability resides in MariaDB MCP 0.1.0 and allows attackers to gain access to sensitive data potentially leading to system compromise or data leakage. As MariaDB is widely used, its security vulnerabilities matter to a broad spectrum of systems and applications. Mitigation strategies and patches are available to address this issue.

Vulnerability Summary

CVE ID: CVE-2025-56404
Severity: High (7.5/10)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

MariaDB MCP | 0.1.0

How the Exploit Works

The vulnerability stems from a lack of user validation in the Server-Sent Events (SSE) service within MariaDB MCP 0.1.0. An attacker can exploit this flaw by sending malicious requests to the SSE service, thereby gaining unauthorized access to sensitive data. This can lead to potential system compromise or data leakage if the exposed information is of high value.

Conceptual Example Code

Below is a conceptual example of how an attacker might exploit this vulnerability:

GET /sse/service HTTP/1.1
Host: vulnerable-db.example.com
Accept: text/event-stream
{ "malicious_payload": "stealSensitiveData()" }

In this example, the attacker sends a GET request to the SSE service and injects a malicious payload designed to steal sensitive data.

Mitigation

The best mitigation strategy to address this vulnerability is to apply the vendor-supplied patch. If this is not immediately feasible, temporary mitigation can be achieved by using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor and/or block malicious requests targeting the SSE service in MariaDB MCP 0.1.0.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.
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