Home→Vulnerabilities→CVE-2023-21839
Active Exploitation

CVE-2023-21839

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.

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Confirmed Active Exploitation

This vulnerability is listed in the CISA KEV Catalog. Federal agencies are mandated to patch immediately. Immediate remediation is required.

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Public Exploit Available

A Proof-of-Concept (PoC) or exploit code for this vulnerability is publicly available. This significantly increases the risk of exploitation.

Exploitation Probability (EPSS)

Critical Priority
94.13%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

2 events
Jan 18, 2023
Vulnerability Disclosed
Published to component-level vulnerability database.
Oct 27, 2025
Last Updated
Record updated with new analysis or tags.

Threat Actor Attribution

PREMIUM INTEL
Associated Groups:Lazarus Group, APT28
Ransomware Campaigns:LockBit 3.0, BlackCat
IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

Affected Products

3 Total
oracle/weblogic_server12.2.1.3.0
oracle/weblogic_server12.2.1.4.0
oracle/weblogic_server14.1.1.0.0

References

PoC Exploit
http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.htmlPacketstormsecurity
ExploitThird Party AdvisoryVDB Entry
https://www.oracle.com/security-alerts/cpujan2023.htmlOracle
PatchVendor Advisory
http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.htmlPacketstormsecurity
ExploitThird Party AdvisoryVDB Entry
https://www.oracle.com/security-alerts/cpujan2023.htmlOracle
PatchVendor Advisory

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Vulnerability Details

CVSS Base Score
7.5/ 10
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published Date
Jan 18, 2023
Last Modified
Oct 27, 2025
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