---
title: "CVE-2020-2883: Oracle WebLogic Server Unspecified Vulnerability"
url: https://erroneo.us/security/cve/CVE-2020-2883/
description: "CVE-2020-2883 (Oracle WebLogic Server): Exploited in the wild (CISA KEV). Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware…"
type: vulnerability-record
section: "Security Digest"
date_published: 2020-04-15
date_modified: 2026-01-12
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2020-2883"
kev: true
cvss: 9.8
epss: 0.94582
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2020-2883: Oracle WebLogic Server Unspecified Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Oracle WebLogic Server. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-01-07, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-01-28 ; treat that as the outer limit, not the target.
- EPSS 94.6% , percentile 99.9: FIRST’s model estimates a 94.6% chance of exploitation activity in the next 30 days, higher than 99.9% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

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).

## Affected products (CVE record)

- Oracle Corporation WebLogic Server: 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0

## Severity

- oracle CVSS 3.0: 9.8 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-01-07; federal due date 2025-01-28. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 94.58% probability of exploitation activity in the next 30 days; percentile 99.9.

## Sources

- [Listed in CISA KEV notes (oracle.com)](https://www.oracle.com/security-alerts/cpuapr2020.html)
- [CVE.org record CVE-2020-2883](https://www.cve.org/CVERecord?id=CVE-2020-2883)
- [NVD entry CVE-2020-2883](https://nvd.nist.gov/vuln/detail/CVE-2020-2883)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2883)
- [zerodayinitiative.com](https://www.zerodayinitiative.com/advisories/ZDI-20-504/)
- [zerodayinitiative.com](https://www.zerodayinitiative.com/advisories/ZDI-20-570/)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/157950/WebLogic-Server-Deserialization-Remote-Code-Execution.html)

---
Source page: https://erroneo.us/security/cve/CVE-2020-2883/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt