Is CVE-2023-21839 actively exploited?

Yes. CVE-2023-21839 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2023-21839 be exploited remotely?

The attack vector of CVE-2023-21839 has not been classified yet.

What is the CVSS score of CVE-2023-21839?

CVE-2023-21839 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2023-21839

HIGHCISA KEVIN THE WILD

CVE-2023-21839

Published: May 1, 2023

EPSS:94.08%probability of exploitation in 30 daysPercentile:99.9th

Official Description

Oracle WebLogic Server contains an unspecified vulnerability that allows an unauthenticated attacker with network access via T3, IIOP, to compromise Oracle WebLogic Server.

NVD Source

CISA KEV Advisory

Oracle WebLogic Server Unspecified Vulnerability

Oracle WebLogic Server contains an unspecified vulnerability that allows an unauthenticated attacker with network access via T3, IIOP, to compromise Oracle WebLogic Server.

Added to KEV: 2023-05-01Federal patch deadline: 2023-05-22

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Oracle WebLogic Server has an unspecified vulnerability that allows an unauthenticated attacker to compromise the server via network access using T3 or IIOP protocols. The high EPSS score of 0.94080 indicates a very high likelihood of exploitation, making this a critical issue.

This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, confirming its real-world impact. It is remotely exploitable without authentication.

Recommended Action

Organizations should apply the latest security patches for Oracle WebLogic Server to address this critical vulnerability and restrict T3/IIOP access where possible.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-21839 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2023-21839 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.