CVE-2025-30762 is a high-severity vulnerability affecting Oracle WebLogic Server versions 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0. This vulnerability resides in the core component of Oracle Fusion Middleware's WebLogic Server and allows an unauthenticated attacker with network access to exploit the system via the T3 and IIOP protocols. These protocols are used internally by WebLogic Server for communication between server instances and clients. The vulnerability is classified under CWE-306, indicating an authorization bypass or missing authentication mechanism. The CVSS 3.1 base score is 7.5, reflecting a high impact primarily on confidentiality, with no impact on integrity or availability. The attack vector is network-based (AV:N), requiring no privileges (PR:N) or user interaction (UI:N), and the scope remains unchanged (S:U). Successful exploitation can lead to unauthorized access to critical data or complete exposure of all data accessible through the Oracle WebLogic Server instance. No known exploits are currently reported in the wild, and no official patches have been linked yet, indicating a need for immediate attention and monitoring for updates from Oracle. Given the widespread use of Oracle WebLogic Server in enterprise environments for hosting Java EE applications, this vulnerability poses a significant risk, especially in environments where T3 and IIOP protocols are exposed or accessible over the network.

For European organizations, the impact of CVE-2025-30762 can be severe. Oracle WebLogic Server is widely deployed in financial institutions, government agencies, telecommunications, and large enterprises across Europe. Unauthorized access to critical data could lead to data breaches involving sensitive personal data protected under GDPR, intellectual property theft, and disruption of business-critical applications. The confidentiality breach could result in regulatory fines, reputational damage, and loss of customer trust. Since the vulnerability does not affect integrity or availability directly, the primary concern is data exposure. However, attackers gaining unauthorized access could leverage this foothold for further lateral movement or data exfiltration. The ease of exploitation without authentication and user interaction increases the risk of automated attacks or scanning by threat actors. European organizations with exposed WebLogic Server instances on internal or external networks are particularly vulnerable, especially if network segmentation and access controls are insufficient.

1. Immediate network-level controls: Restrict access to T3 and IIOP ports (typically 7001, 7002, or custom ports) using firewalls or network ACLs to trusted hosts only. 2. Disable or restrict use of T3 and IIOP protocols if not required for business operations. 3. Monitor network traffic for unusual or unauthorized access attempts targeting WebLogic Server's T3/IIOP services. 4. Apply Oracle's security advisories promptly once patches or mitigations are released; monitor Oracle's official channels for updates. 5. Implement WebLogic Server security best practices, including strong authentication, authorization policies, and least privilege principles. 6. Conduct internal vulnerability scans and penetration tests focusing on WebLogic Server instances to identify exposure. 7. Employ Web Application Firewalls (WAF) or Intrusion Prevention Systems (IPS) capable of detecting and blocking exploitation attempts targeting this vulnerability. 8. Maintain comprehensive logging and alerting to detect suspicious activity related to WebLogic Server access. 9. For critical environments, consider temporary isolation or migration of vulnerable WebLogic instances until patches are available.