CVE-2023-21839: Oracle WebLogic Server Unspecified Vulnerability

Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-7d69869456bd, updated 2026-11-02T23:39:54.475Z.

CISA Known Exploited Vulnerabilities

Name: Oracle WebLogic Server Unspecified Vulnerability
Vendor: Oracle
Product: WebLogic Server
Added to the catalog: 2023-05-01
Due date for US federal agencies: 2023-05-22
Catalog version: 2026.10.30

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

Required action (CISA)

Apply updates per vendor instructions.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status: Analyzed
Published: 2023-01-18T00:15:13.450
Last modified: 2026-06-17T05:34:09.560
Weaknesses: CWE-502, CWE-306

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).

Metric	Score	Severity	Vector	Scored by
CVSS 3.1	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	[email protected] (Secondary)

References

http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.html (Exploit, Third Party Advisory, VDB Entry)
https://www.oracle.com/security-alerts/cpujan2023.html (Patch, Vendor Advisory)
http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.html (Exploit, Third Party Advisory, VDB Entry)
https://www.oracle.com/security-alerts/cpujan2023.html (Patch, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21839 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:08.214Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-21839

CVE record

Assigner: oracle
State: PUBLISHED
Published: 2023-01-17T23:35:09.774Z
Updated: 2025-10-21T23:15:28.458Z
Problem types: 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.

References

Oracle Advisory
http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.html

Read on 2026-11-03T02:02:37.684Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/21xxx/CVE-2023-21839.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

CWE-306: Missing Authentication for Critical Function

Model: Asset Vulnerability Enumeration (acts on Software)
Isolate: Application-based Process Isolation (acts on Subroutine)
Harden: Trusted Library (acts on Subroutine)
Harden: Software Update (acts on Software)
Restore: Restore Software (acts on Software)
Model: Software Inventory (acts on Software)
Harden: Variable Initialization (acts on Subroutine)
Harden: Domain Logic Validation (acts on Subroutine)
Harden: Credential Scrubbing (acts on Subroutine)

D3FEND ontology version 1.6.0.

Read on 2026-11-02T23:55:55.098Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-306.json

CWE-502: Deserialization of Untrusted Data

Harden: Software Update (acts on Software)
Harden: Trusted Library (acts on Subroutine)
Model: Software Inventory (acts on Software)
Model: Asset Vulnerability Enumeration (acts on Software)
Harden: Domain Logic Validation (acts on Subroutine)
Harden: Variable Initialization (acts on Subroutine)
Harden: Credential Scrubbing (acts on Subroutine)
Restore: Restore Software (acts on Software)
Isolate: Application-based Process Isolation (acts on Subroutine)

D3FEND ontology version 1.6.0.

Read on 2026-11-02T23:56:57.230Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-502.json

MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/

Sources and licences

CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
CC0 1.0 Universal
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
CVE Program Terms of Use ("CVE Usage" licence)
MITRE D3FEND
MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/
MITRE D3FEND Terms of Use (site + knowledge graph); source repo MIT

Cite this page

Dragons Eye Ransomware Tracker, "CVE-2023-21839: Oracle WebLogic Server Unspecified Vulnerability",
entity page, dataset version ref-7d69869456bd, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2023-21839 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T05:34:09.560.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:15:28.458Z.
Underlying source: MITRE D3FEND, ontology version 1.6.0.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.

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