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CRITICAL · CVSS 9.8 CISA Known Exploited Vulnerability

CVE-2020-2883

Oracle WebLogic Server Unspecified Vulnerability

Oracle WebLogic Server

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).

CVSS
9.8
CRITICAL
EPSS
94.6%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
15 Apr 2020
NVD

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 7 January 2025. US federal agencies were required to remediate it by 28 January 2025.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 94.6%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2020-2883 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2020-2883.

What does CVE-2020-2883 affect?

CVE-2020-2883 affects Oracle WebLogic Server. 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).

How severe is CVE-2020-2883?

CVE-2020-2883 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 94.6%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 28 January 2025.

How should organisations respond to CVE-2020-2883?

Apply the vendor patch for Oracle WebLogic Server as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.