How severe is CVE-2023-21839?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-21839 known to be exploited?

Yes. CVE-2023-21839 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-05-01), indicating it is being actively exploited. 68 public proof-of-concept repositories are indexed.

Vulnerability in Oracle Corporation Weblogic Server

CVE-2023-21839

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated at…

EPSS: 0.942 (99.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Oracle Corporation Weblogic Server — versions 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-05-01. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-05-22.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

Oracle Advisory (vendor-advisory)
packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Exe…

Frequently asked questions

What is CVE-2023-21839?: CVE-2023-21839 is a high-severity vulnerability in Oracle Corporation Weblogic Server. CVSS score: 7.5/10. Published 2023-01-17.
How severe is CVE-2023-21839?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-21839 known to be exploited?: Yes. CVE-2023-21839 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-05-01), indicating it is being actively exploited. 68 public proof-of-concept repositories are indexed.