CVE-2025-61764 is a vulnerability identified in Oracle WebLogic Server, specifically affecting versions 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0. The flaw resides in the Core component of Oracle Fusion Middleware and allows an unauthenticated attacker with network access via HTTP to exploit improper access control mechanisms (classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor). The attacker can gain unauthorized read access to a subset of data accessible through the WebLogic Server, potentially exposing sensitive configuration or operational information. The vulnerability does not require any user interaction or prior authentication, making it easily exploitable remotely over the network with low attack complexity. The CVSS 3.1 base score is 5.3, reflecting a medium severity focused on confidentiality impact (C:L), with no impact on integrity (I:N) or availability (A:N). The scope remains unchanged (S:U), indicating the vulnerability affects only the vulnerable component without impacting other system components. No known exploits have been reported in the wild as of the publication date, but the ease of exploitation and network accessibility make it a significant risk. Oracle has not yet published patches, so mitigation currently relies on network-level controls and monitoring. This vulnerability is particularly concerning for organizations relying on Oracle WebLogic Server for critical middleware services, as unauthorized data disclosure can aid attackers in further reconnaissance or targeted attacks.

For European organizations, the primary impact of CVE-2025-61764 is unauthorized disclosure of sensitive data hosted or processed by Oracle WebLogic Server instances. This could include configuration details, internal application data, or other sensitive information that may facilitate further attacks or data breaches. Sectors such as finance, government, healthcare, and critical infrastructure that rely heavily on Oracle WebLogic for middleware services are at heightened risk. Data exposure could lead to regulatory compliance issues under GDPR, reputational damage, and potential financial losses. Since the vulnerability does not affect integrity or availability, direct service disruption or data manipulation is unlikely; however, the confidentiality breach alone can have cascading effects. The ease of exploitation without authentication increases the risk of opportunistic attacks, especially if WebLogic servers are exposed to untrusted networks or the internet. Organizations with insufficient network segmentation or monitoring may be more vulnerable to exploitation attempts.

1. Apply Oracle-provided patches immediately once they become available to remediate the vulnerability at the source. 2. Until patches are released, restrict network access to Oracle WebLogic Server instances by implementing strict firewall rules limiting HTTP access only to trusted internal IP addresses or VPNs. 3. Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious HTTP requests targeting WebLogic Server endpoints. 4. Conduct thorough network and application logging and monitoring to identify anomalous access patterns or unauthorized data retrieval attempts. 5. Review and harden WebLogic Server configurations to minimize exposed data surfaces and disable unnecessary services or interfaces. 6. Perform regular vulnerability scanning and penetration testing focused on middleware components to detect similar issues proactively. 7. Educate IT and security teams about this vulnerability to ensure rapid incident response if exploitation is suspected. 8. Consider network segmentation to isolate WebLogic servers from less trusted network zones and reduce attack surface exposure.