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Findings

CVE-2020-2551

Oracle Fusion Middleware Unspecified Vulnerability

Published Jan 15, 2020 · corrected/updated Jun 16, 2026 · oracle weblogic server · evidence confidence very high

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2020-2551 is a critical public vulnerability record for oracle weblogic server. CISA lists it as known exploited. Published remediation guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether oracle weblogic server is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: oracle/weblogic server (10.3.6.0.0); oracle/weblogic server (12.1.3.0.0); oracle/weblogic server (12.2.1.3.0); oracle/weblogic server (12.2.1.4.0). Published remediation guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 9.8, EPSS 92.8%. CISA lists it as known exploited. Sources contributing to this record: cisa_kev, cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Confirmed in CISA KEV since Nov 16, 2023. Listed in the CISA Known Exploited Vulnerabilities catalog.

  • Patch and remediation

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA due date Dec 7, 2023.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

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 15, 2020 · Catalog

    Detected

    Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeove

  2. Nov 16, 2023 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  3. Dec 7, 2023 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeove

Affected

  • cpe oracle/weblogic server10.3.6.0.0
  • cpe oracle/weblogic server12.1.3.0.0
  • cpe oracle/weblogic server12.2.1.3.0
  • cpe oracle/weblogic server12.2.1.4.0
  • vendor Oracle Fusion Middlewareversion unspecified

Sources

  • CISA KEVConfirmed exploitationCVE-2020-2551

    Oracle Fusion Middleware contains an unspecified vulnerability in the WLS Core Components that allows an unauthenticated attacker with network access via IIOP to compromise the WebLogic Server.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-2551

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-2551

    30-day exploitation probability 92.8%

    first.org
  • NIST NVDVulnerability recordCVE-2020-2551

    Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with netw

    nvd.nist.gov

References