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Full vulnerability report · 2020
CVE-2020-2883High confidence

Oracle WebLogic Server Unspecified Vulnerability

Oracle · WebLogic Server

9.8CriticalCVSS 3.1
Recommended action
Protect now

CISA confirms exploitation in the wild and lists 2025-01-28 as the remediation due date.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • CISA confirms exploitation in the wild.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 94.58% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Oracle WebLogic Server and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-22676

CISA KEV mirrored by ENISA

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). 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, T3 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).

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 7 Jan 2025. Evidence sources: cisa_kev.
ENISA score
9.8 · CVSS 3.0
Advisory evidence
1 linked advisory record
Recommended actionProtect now

CISA confirms exploitation in the wild and lists 2025-01-28 as the remediation due date.

Fix not verified
01

What, why and how

Oracle WebLogic Server, a product within the Fusion Middleware suite, contains an unspecified vulnerability exploitable by an unauthenticated attacker with network access via IIOP or T3.

What

Oracle WebLogic Server, a product within the Fusion Middleware suite, contains an unspecified vulnerability exploitable by an unauthenticated attacker with network access via IIOP or T3.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Oracle WebLogic Server, a product within the Fusion Middleware suite, contains an unspecified vulnerability exploitable by an unauthenticated attacker with network access via IIOP or T3.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2025-01-07.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration.
CWE not yet assigned
CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCISA KEV
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2020-22676Known-exploited evidence recorded

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). 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, T3 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).

Official EUVD record ↗
Canadian Centre for Cyber Security · English · AL20-014Oracle WebLogic Server Remote Code Execution Vulnerability – CVE-2020-2883

On 14 April 2020, Oracle released an update to address a remote code execution vulnerability, tracked as CVE-2020-2883, in the following versions of Oracle WebLogic Server: - 10.3.6.0.0 - 12.1.3.0.0 - 12.2.1.3.0 - 12.2.1.4.0 Oracle WebLogic is a middleware product that is typically situated between a front-facing application and a back-end database. A flaw exists in the way WebLogic de-serialises requests sent using T3, a proprietary protocol for communication between the WebLogic server and remote Java virtual machines. A remote actor could exploit this vulnerability by sending a specially crafted T3 request to the WebLogic server, resulting in arbitrary code contained within the request being executed in the context of the account running the service. Proof of concept code leveraging this vulnerability has been published, and Oracle has indicated that exploitation attempts have been observed.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20200422Security Bulletin 22 Apr 2020

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 22 Apr 2020, published on 22 April 2020. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CISA · English · ICSA-25-261-05Remote Code Execution Vulnerability in Hitachi Energy Service Suite Product

Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP, T3 to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-004148Oracle Fusion Middleware の Oracle WebLogic Server における Core に関する脆弱性

Oracle Fusion Middleware の Oracle WebLogic Server には、Core に関する処理に不備があるため、機密性、完全性、および可用性に影響のある脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6371美 CISA 발표 주요 Exploit 정보공유(Update. 2025-01-07)

Oracle WebLogic Server, a product within the Fusion Middleware suite, contains an unspecified vulnerability exploitable by an unauthenticated attacker with network access via IIOP or T3.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 15 Apr 2020 · Last source change 12 Jan 2026, 21:02 UTC · CWE not yet assigned

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2020-22676
Product sourceCISA KEV
Remediation sourceCVE/CNA references
CWE sourceUnavailable
NVD statusNVD enriched

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: publisher.hitachienergy.com/preview?DocumentID=8DBD000215&LanguageCode=en&DocumentPartId=&Action=launch.
    Before
    remediation: publisher.hitachienergy.com/preview?DocumentID=8DBD000215&LanguageCode=en&DocumentPartId=&Action=launch · vendor advisory: oracle.com/cpuapr2020.html
    After
    vendor advisory: oracle.com/cpuapr2020.html
    oracle.com ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 · Fixed: Update to version 9.8.2 or latest - Hitachi Energy recommends that customers apply the update at the earliest convenience - While reviewing the recommended immediate actions, assess the risk exposure of affected products within the operational environment and update or upgrade if necessary
    After
    WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CISA KEV ↗
  3. Remediation statusRemediation status changed from Patch available to Awaiting fix.
    Before
    Patch available
    After
    Awaiting fix
    oracle.com ↗
  4. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: cyber.gc.ca/oracle-weblogic-server-remote-code-execution-vulnerability-cve-2020-2883.
    Before
    remediation: cyber.gc.ca/oracle-weblogic-server-remote-code-execution-vulnerability-cve-2020-2883 · vendor advisory: oracle.com/cpuapr2020.html
    After
    vendor advisory: oracle.com/cpuapr2020.html
    oracle.com ↗
  5. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    oracle.com ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    10.3.6.0.0; 12.1.3.0.0; 12.2.1.3.0; 12.2.1.4.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  7. Affected versionsThe structured affected or fixed version information changed.
    Before
    WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 · Fixed: Update to version 9.8.2 or latest - Hitachi Energy recommends that customers apply the update at the earliest convenience - While reviewing the recommended immediate actions, assess the risk exposure of affected products within the operational environment and update or upgrade if necessary
    CISA ↗
  8. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    CISA ↗
  9. Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
    Before
    Awaiting fix
    After
    Mitigation available
    Canadian Centre for Cyber Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
ENISA EUVD · EUVD-2020-22676↗CISA KEV record↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-2883 · cve.blacktree.nl