CVE-2023-21839 is a security vulnerability affecting Oracle WebLogic Server, a product of Oracle Fusion Middleware. With a severity score of 7.5, this vulnerability allows unauthenticated attackers to gain unauthorized access to critical data or even complete access to all accessible data on the affected systems. It's crucial for users to stay informed and apply necessary security patches to protect their systems.

How do I know if I'm affected?

To determine if you're affected by the vulnerability, you'll need to check if you're using Oracle WebLogic Server versions 12.2.1.3.0, 12.2.1.4.0, or 14.1.1.0.0. If you're using one of these versions, your system may be at risk. It's important to stay informed about security updates and apply necessary patches to protect your system from unauthorized access to critical data.

What should I do if I'm affected?

If you're affected by the vulnerability, it's crucial to take action to secure your system. Update your Oracle WebLogic Server to a version that isn't vulnerable. Apply the security patches provided in the Oracle Critical Patch Update Advisory. Consider implementing additional security measures, such as blocking network protocols or removing unnecessary privileges, to further reduce the risk of a successful attack.

Is CVE-2023-21839 in CISA’s Known Exploited Vulnerabilities Catalog?

Yes, CVE-2023-21839 is listed in CISA's Known Exploited Vulnerabilities Catalog. The vulnerability, named Oracle WebLogic Server Unspecified Vulnerability, was added to the catalog on May 1, 2023, with a due date of May 22, 2023. The required action is to apply updates according to the vendor's instructions to mitigate the risk associated with this vulnerability.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized NVD-CWE-noinfo, which means insufficient information about CVE-2023-21839.

For more details

CVE-2023-21839 is a high-severity vulnerability affecting Oracle WebLogic Server, with potential consequences including unauthorized access to critical data. For a comprehensive understanding of this vulnerability, consult the NVD page and the resources listed below.

• Oracle Weblogic PreAuth Remote Command Execution

• Oracle Critical Patch Update Advisory - January 2023

• BOD 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities | CISA

• CISA Known Exploited Vulnerabilities Catalog