CVE-2025-53047: 
Oracle Database Server vulnerability analysis and mitigation

CVE-2025-53047 is a security vulnerability discovered in the Portable Clusterware component of Oracle Database Server. The vulnerability affects Oracle Database Server versions 19.3-19.28, 21.3-21.19, and 23.4-23.9. It was disclosed on October 21, 2025, as part of Oracle's Critical Patch Update (Oracle CPU).

The vulnerability is characterized as easily exploitable and allows unauthenticated attackers with network access via Bonjour protocol to compromise Portable Clusterware. The vulnerability has received a CVSS 3.1 Base Score of 5.8, primarily impacting confidentiality. The CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N), indicating network accessibility, low attack complexity, no privileges required, and no user interaction needed (NVD).

While the vulnerability is specifically located in the Portable Clusterware component, successful exploitation can significantly impact additional products beyond the immediate scope. The primary impact is unauthorized read access to a subset of Portable Clusterware accessible data, potentially exposing sensitive information to attackers (Oracle CPU).

Oracle has released patches for all affected versions (19.3-19.28, 21.3-21.19, and 23.4-23.9) as part of the October 2025 Critical Patch Update. Organizations are strongly advised to apply these security patches without delay to protect against potential exploitation (Oracle CPU).