How severe is CVE-2020-2551?

CVE-2020-2551 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-2551?

Affected package information for CVE-2020-2551 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2020-2551?

No fixed version has been published for CVE-2020-2551 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2020-2551 actively exploited in the wild?

Yes. There are 20 known exploit references for CVE-2020-2551, including 13 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2020-2551?

CVE-2020-2551 has an EPSS (Exploit Prediction Scoring System) score of 94.4%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2020-2551 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2020-2551 (Oracle Fusion Middleware Unspecified Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-11-16. CISA required all US federal civilian agencies to remediate this vulnerability by 2023-12-07. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Which products and versions are affected by CVE-2020-2551?

CVE-2020-2551 affects oracle weblogic server (4 versions, e.g. 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0…). Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2020-2551?

A Nuclei detection template exists for CVE-2020-2551, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2020-2551 published, and has it been updated?

CVE-2020-2551 was published on January 15, 2020 and was last updated on October 27, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-11-16 — agencies required to remediate by 2023-12-07

CVE-2020-2551

CRITICAL

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0…

Published

Jan 15, 2020

Updated

Oct 27, 2025

Affected

0 pkgs

Patched

None yet

Exploits

20 known

EPSS Exploitation Probability

via FIRST.org ↗

94.4%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

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

1 product · 4 configurations

Application

weblogic serveroracle

4 versions

10.3.6.0.012.1.3.0.012.2.1.3.012.2.1.4.0

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.