---
id: "CVE-2020-2883"
kind: "vulnerability"
aliases: ["CVE-2020-2883"]
title: "Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Oracle WebLogic Server", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 10.3.6.0.0", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 12.1.3.0.0", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 12.2.1.3.0", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 12.2.1.4.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "java", "oracle", "runtime", "self-hosted", "weblogic"]
not_affected_if: ["managed-hosting", "no-weblogic-deployed"]
published_at: "2020-04-15T14:15:33+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-2883", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-2883", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)

Oracle WebLogic Server has an unspecified flaw that an unauthenticated attacker can reach over the network through the IIOP or T3 protocols. It is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks are happening in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Oracle WebLogic Server affected ? fixed ?
- vendor:oracle weblogic server affected = 10.3.6.0.0 fixed ?
- vendor:oracle weblogic server affected = 12.1.3.0.0 fixed ?
- vendor:oracle weblogic server affected = 12.2.1.3.0 fixed ?
- vendor:oracle weblogic server affected = 12.2.1.4.0 fixed ?

## Fix

Apply the mitigations from Oracle's vendor instructions for CVE-2020-2883, or stop using the affected WebLogic Server if no mitigation is available.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-2883
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2020-2883

## From the sources

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).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_