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Dossier · Vulnerability

Actively exploited · CISA KEV · NVD published 2023-01-18

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 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).

  1. First PoC
  2. 1114 days →Metasploit
  3. 219 days →First cited attacker

Signals

Exploited in the wild
Yesadded 2023-05-01 · due 2023-05-22. An observation, not a forecast.
EPSS · 30-day forecast
99.9%Chance of exploitation in the next 30 days, 100th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD · HIGH
7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

10 known · links only

GitHub PoCs · by trust, then stars8

  1. DXask88MA/Weblogic-CVE-2023-21839 ↗Trust ok 100

    ★ 241 · created 2023-02-21

  2. ASkyeye/CVE-2023-21839 ↗Trust ok 100

    Weblogic CVE-2023-21839 RCE (无需Java依赖一键RCE)

    ★ 118 · created 2023-02-24

  3. dinosn/CVE-2024-20931 ↗Trust ok 100

    CVE-2024-20931, this is the bypass of the patch of CVE-2023-21839

    ★ 61 · created 2024-02-06

  4. Firebasky/CVE-2023-21839 ↗Trust ok 100

    CVE-2023-21839工具

    ★ 26 · created 2023-03-11

  5. houqe/POC_CVE-2023-21839 ↗Trust ok 100

    CVE-2023-21839 Python版本

    ★ 19 · created 2023-04-15

  6. dinosn/CVE-2024-21182 ↗Trust ok 100

    Reproducible Docker lab for CVE-2024-21182 — Oracle WebLogic T3/IIOP OpaqueReference JNDI injection → unauthenticated RCE (CVE-2023-21839 patch-bypass family). One-command validate.sh.

    ★ 3 · created 2026-06-02

  7. Romanc9/Gui-poc-test ↗Trust ok 100

    A testing tool for CobaltStrike-RCE:CVE-2022-39197; Weblogic-RCE:CVE-2023-21839; MinIO:CVE-2023-28432

    ★ 2 · created 2023-12-03

  8. kw3h4/CVE-2023-21839-metasploit-scanner ↗Trust ok 100

    ★ 0 · created 2023-05-29

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

Metasploit1

  1. Oracle Weblogic PreAuth Remote Command Execution via ForeignOpaqueReference IIOP Deserialization ↗

    Oracle Weblogic 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0 prior to the Jan 2023 security update are vulnerable to an unauthenticated remote code execution vulnerability due to a post deserialization vulnerability. This occurs when an attacker serializes a "ForeignOpaqueReference" class object, deserializes it on the target, and then post deserialization, calls the object's "getReferent()" method, which will make use of the "ForeignOpaqueReference" class's "remoteJNDINam

    ruby · seen 2026-10-18

Nuclei1

  1. Oracle WebLogic Server - Unauthorized Access ↗

    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 (Co

    yaml · seen 2026-10-18

On the wire

0 dispatches

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