Known exploited vulnerability
CVE-2023-21839
The short answer
CVE-2023-21839 affects Oracle Corporation WebLogic Server and is rated high (CVSS 7.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-05-01: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
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).
Severity
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploited (CISA KEV)
Yes, since May 1, 2023
Federal due date May 22, 2023
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
What CISA says to do
Apply updates per vendor instructions.
Affected products
WebLogic Server. NVD's record lists the exact affected versions.
References
- www.oracle.com/security-alerts/cpujan2023.html PatchVendor Advisory
- www.oracle.com/security-alerts/cpujan2023.html PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21839 US Government Resource
Questions
Is CVE-2023-21839 being exploited?
Yes. CISA added CVE-2023-21839 to its Known Exploited Vulnerabilities catalog on 2023-05-01, with a federal remediation due date of 2023-05-22.
How do I fix CVE-2023-21839?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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