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VulnerabilityCVE-2020-2551Published 2020-01-15

CVE-2020-2551 — Oracle Weblogic Server

criticalCISA KEV

As of 2025-10-27, CVE-2020-2551 is a CRITICAL-severity vulnerability in Oracle Weblogic Server, CVSS v3.1 9.8, EPSS 94.4% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-16), with a US federal remediation deadline of 2023-12-07. No Threadlinqs-tracked threat campaign has been attributed to CVE-2020-2551 as of 2025-10-27; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
9.8/10Critical
EPSS
94.4%Higher than 99.9% of scored CVEs
CISA KEV
ListedAdded · due 2023-12-07
Tracked threats
0None linked yet
Priority
9/10Threadlinqs triage score
Published
Updated 2025-10-27
CVSS v3.1 9.8 (CRITICAL) · EPSS 94.4% (higher than 99.9% of all scored CVEs) · Priority 9/10 · Published 2020-01-15

Last updated:

What is CVE-2020-2551?

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).

The record classifies CVE-2020-2551 under weakness class NVD-CWE-noinfo. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 2455 days ago.

Severity and exploitation probability

CVSS v3.1 base score
9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
94.4% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
CISA KEV
Listed since 2023-11-16, federal remediation deadline 2023-12-07
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2020-01-15, last modified 2025-10-27

Is CVE-2020-2551 being exploited?

CISA added CVE-2020-2551 to the Known Exploited Vulnerabilities catalog on 2023-11-16, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2023-12-07 under BOD 22-01. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

Affected products and versions

  • Oracle: Weblogic Server 10.3.6.0.0, Weblogic Server 12.1.3.0.0, Weblogic Server 12.2.1.3.0, Weblogic Server 12.2.1.4.0

How to fix CVE-2020-2551

Vendor advisory: https://www.oracle.com/security-alerts/cpujan2020.html. Because CVE-2020-2551 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2023-12-07. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2020-2551

No threat campaign in the Threadlinqs corpus currently references CVE-2020-2551, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.