How severe is CVE-2020-2551?

CVE-2020-2551 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-2551 being actively exploited?

Yes. CVE-2020-2551 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-11-16, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-2551?

CVE-2020-2551 primarily affects Oracle Weblogic Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-2551?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-2551 have an EU (EUVD) identifier?

Yes. CVE-2020-2551 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-22344. It is also flagged as exploited in the EUVD (since 2023-11-16).

When was CVE-2020-2551 published?

CVE-2020-2551 was published on 2020-01-15 and last updated on 2026-06-17.

CVE-2020-2551

CVE-2020-2551 is a critical-severity vulnerability in Oracle Weblogic Server with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-11-16).

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 93% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-11-16)
EU (EUVD) id: EUVD-2020-22344
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-11-16)
Affected product: Oracle Weblogic Server
Published: 2020-01-15
Last modified: 2026-06-17

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).

Frequently asked questions

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).
How severe is CVE-2020-2551?: CVE-2020-2551 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-2551 being actively exploited?: Yes. CVE-2020-2551 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-11-16, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-2551?: CVE-2020-2551 primarily affects Oracle Weblogic Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-2551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-2551 have an EU (EUVD) identifier?: Yes. CVE-2020-2551 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-22344. It is also flagged as exploited in the EUVD (since 2023-11-16).
When was CVE-2020-2551 published?: CVE-2020-2551 was published on 2020-01-15 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:oracle:weblogic_server:10.3.6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:12.1.3.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*

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