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CVE-2025-30736: Unauthenticated Remote Exploit in Java VM of Oracle Database Server

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Overview

CVE-2025-30736 is a high-impact vulnerability found in the Java VM component of Oracle Database Server, which can be exploited remotely without authentication. If successfully exploited, this vulnerability could lead to unauthorized creation, deletion, modification, and access to critical data, potentially compromising the entire system or leading to data leakage.

Vulnerability Summary

CVE ID: CVE-2025-30736
Severity: High (CVSS: 7.4)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized data creation, deletion, modification, and access to all Java VM accessible data

Affected Products

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Product | Affected Versions

Oracle Database Server | 19.3-19.26
Oracle Database Server | 21.3-21.17
Oracle Database Server | 23.4-23.7

How the Exploit Works

The exploit takes advantage of a vulnerability in the Java VM component of the Oracle Database Server. An unauthenticated attacker with network access can send specially crafted requests to the server to compromise the Java VM. This can result in unauthorized creation, deletion, modification, and access to critical data, or even complete access to all Java VM accessible data.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited. Please note that this is purely hypothetical and should not be attempted.

POST /JavaVM/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/xml
{ "exploit_payload": "<!--#exec cmd='rm -rf /' -->" }

Recommended Mitigation

It is strongly advised to apply the vendor-provided patch to fix this vulnerability. In case the patch cannot be immediately applied, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. Nonetheless, these are not long-term solutions and the patch should be applied as soon as possible to fully remediate the vulnerability.

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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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