CVE-2023-21839
Oracle — Oracle WebLogic Server Unspecified Vulnerability
Oracle · CWE-502 — Deserialization of untrusted data | CWE-306 · in CISA KEV since 2023-05-01
EVRS 84 of 100 Urgent
Patch This Cycle
Rank 464 of 2,960 tracked
Why it scores 84
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.999.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
No fixed version identified yetCISA required action
Affected versions
- weblogic server
12.2.1.3.012.2.1.4.014.1.1.0.0
Remediation
Apply updates per vendor instructions.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 7.5 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.999 (99.97th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2023-05-22 · KEV since 2023 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 7.5 (v3.1), assigned by oracle. | Listed | ENISA EUVD |
Description
NVDVulnerability 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).
What CISA says to do
Public module
Metasploit lists a public excellent-rank module for this CVE: Oracle Weblogic PreAuth Remote Command Execution via ForeignOpaqueReference IIOP Deserialization (multi/iiop/cve_2023_21839_weblogic_rce). A module existing is not the same as active exploitation; see metasploit.com.