CVE-2020-2883

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

9.8 CriticalIn KEVPublic exploit

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).

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

94.6%Up 67.6 points since Apr 14, 2021

What each source reports

CVE List Score used 9.8

Record: CVE-2020-2883
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

EUVDEUVD-2020-22676 9.8

Record: EUVD-2020-22676
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-9x8q-p3qp-r24w 9.8

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

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 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).

Record: GHSA-9x8q-p3qp-r24w
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

CISA KEV No score

Oracle WebLogic Server Unspecified Vulnerability

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.

Record: CVE-2020-2883
Updated: 2026-11-02

NVD 9.8

Record: CVE-2020-2883
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	WebLogic Server Deserialization RCE BadAttributeValueExpException ExtComp	2020-04-30
PoC in GitHub	Y4er/CVE-2020-2883	2020-05-10
PoC in GitHub	MagicZer0/Weblogic_CVE-2020-2883_POC	2020-05-13
PoC in GitHub	ZZZWD/CVE-2020-2883	2020-06-09
PoC in GitHub	Y4er/WebLogic-Shiro-shell	2020-08-19
PoC in GitHub	FancyDoesSecurity/CVE-2020-2883	2020-10-14
PoC in GitHub	Al1ex/CVE-2020-2883	2020-11-26
PoC in GitHub	Qynklee/POC_CVE-2020-2883	2021-11-15
Metasploit	Oracle Access Manager unauthenticated Remote Code Execution	2022-01-19
Nuclei	Oracle WebLogic Server - Remote Code Execution

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-2883 is a critical vulnerability (CVSS 9.8) in Oracle Weblogic Server, published April 15, 2020. CISA lists it as known to be exploited, since January 7, 2025. EUVD reports exploitation since January 7, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 94.6%, the 99th percentile. No source names a fixed version.