Ameeba Exploit Tracker Tracking CVEs, exploits, and zero-days for defensive cybersecurity research. Ameeba Blog Search Attack Vector Vendor Severity CVE-2025-30749: Oracle Java SE and GraalVM Enterprise Edition High-Risk Vulnerability July 22, 2025 Views: 565 Download Ameeba Chat Overview The CVE-2025-30749 vulnerability is a critical security flaw affecting Oracle Java SE and GraalVM Enterprise Edition products. This vulnerability is particularly sinister due to the potential for an unauthenticated attacker to exploit it and compromise systems, leading to potential system takeover or data leakage. Given the widespread use of these Oracle products, the risk and potential impact of this vulnerability are immense. It is therefore crucial for businesses and individuals to understand the nature of this vulnerability , its potential impacts, and the necessary mitigation steps. Vulnerability Summary CVE ID: CVE-2025-30749 Severity: High (8.1 CVSS score) Attack Vector: Network Privileges Required: None User Interaction: None Impact: System takeover or data leakage Affected Products Escape the Surveillance Era Most apps won’t tell you the truth. They’re part of the problem. Phone numbers. Emails. Profiles. Logs. It’s all fuel for surveillance. Ameeba Chat gives you a way out. • No phone number • No email • No personal info • Anonymous aliases • End-to-end encrypted Chat without a trace. Download Ameeba Chat Learn More Product | Affected Versions Oracle Java SE | 8u451, 8u451-perf, 11.0.27, 17.0.15, 21.0.7, 24.0.1 Oracle GraalVM for JDK | 17.0.15, 21.0.7, 24.0.1 Oracle GraalVM Enterprise Edition | 21.3.14 How the Exploit Works The vulnerability resides in the 2D component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. It can be exploited by an unauthenticated attacker with network access via multiple protocols. The attacker can leverage this flaw to load and run untrusted code, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets. This vulnerability does not apply to Java deployments in servers that load and run only trusted code. Conceptual Example Code Below is a conceptual example of how the vulnerability might be exploited. This is a hypothetical scenario based on the nature of the vulnerability: import java.applet.Applet; import java.awt.Graphics; public class MaliciousApplet extends Applet { public void paint(Graphics g) { try { Runtime.getRuntime().exec("malicious_command"); } catch (Exception e) { e.printStackTrace(); } } } In this example, a malicious applet is created that uses the Runtime.getRuntime().exec() function to execute a malicious command when loaded by a Java sandbox environment. Prevention and Mitigation Measures The most effective way to mitigate this vulnerability is to apply the vendor patch as soon as it becomes available. In the interim, users can opt for temporary mitigation measures such as Web Application Firewall (WAF) or Intrusion Detection Systems (IDS). These systems can help detect and prevent potential exploitation attempts. However, they are not foolproof and should not be considered a complete solution. It is also advisable to limit the loading and running of untrusted code wherever applicable . Want to discuss this further? Join the Ameeba Cybersecurity Group Chat. 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. More posts CVE-2024-29198: High Risk SSRF Vulnerability in GeoServer February 15, 2026 CVE-2025-43701: Improper Permissions Preservation Vulnerability in Salesforce OmniStudio February 15, 2026 CVE-2025-43700: Improper Preservation of Permissions Vulnerability in Salesforce OmniStudio February 15, 2026 CVE-2025-43697: Improper Preservation of Permissions in Salesforce OmniStudio February 15, 2026