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Vulnerabilities

Vulnerability · CVE-2023-21839

Oracle WebLogic Server Unspecified Vulnerability

Published Jan 17, 2023 · catalog updated Jun 16, 2026 · Oracle WebLogic Server

Patch now

CVE-2023-21839 is in the CISA known-exploited catalog, due May 22, 2023. Confirm Oracle WebLogic Server against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.5
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.90%
Remediation
Remediation guidance
Affected products
cpe oracle/weblogic server · vendor Oracle WebLogic Server

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 attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebLogic Server accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe oracle/weblogic server12.2.1.3.0
  • cpe oracle/weblogic server12.2.1.4.0
  • cpe oracle/weblogic server14.1.1.0.0
  • vendor Oracle WebLogic Serverversion unspecified

How to fix CVE-2023-21839

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-21839 is in the CISA known-exploited catalog, due May 22, 2023. Confirm Oracle WebLogic Server against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with oracle/weblogic server 12.2.1.3.0; oracle/weblogic server 12.2.1.4.0; oracle/weblogic server 14.1.1.0.0. Apply updates per vendor instructions.

What should an analyst verify?

CWE-306: Missing Authentication for Critical Function; CWE-502: Deserialization of Untrusted Data. EPSS 99.90%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 17, 2023 · Catalog

    Detected

    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 attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized access to critica

  2. May 1, 2023 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 22, 2023 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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 attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized access to critica

Sources

  • CISA KEVConfirmed exploitationCVE-2023-21839

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

    cisa.gov
  • CVE.orgVulnerability recordCVE-2023-21839

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-21839

    30-day exploitation probability 99.9%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_multi/iiop/cve_2023_21839_weblogic_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-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 attacker with network access via T3, IIOP t

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2023-21839

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.