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CVE-2023-21839

Oracle WebLogic Server Unspecified

7.5 HIGHActively exploited (CISA KEV)Public exploitEPSS 99.9%
  1. Published17 Jan 2023
  2. Added to CISA KEV1 May 2023
  3. Remediation due22 May 2023
Actively exploited (CISA KEV)

Oracle WebLogic Server contains an unspecified vulnerability that allows an unauthenticated attacker with network access via T3, IIOP, to compromise Oracle WebLogic Server.

Added to KEV: 1 May 2023Federal remediation due: 22 May 2023

Description

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebLogic Server accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Oracle Weblogic Server12.2.1.3.0 · 12.2.1.4.0 · 14.1.1.0.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2023-21839 being actively exploited?

Yes. CVE-2023-21839 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 1 May 2023.

How severe is CVE-2023-21839?

CVE-2023-21839 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 99.9% probability of exploitation.

Which products are affected by CVE-2023-21839?

Affected products include Oracle Weblogic Server.

How do I fix CVE-2023-21839?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-21839 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.