CVE-2023-21931: Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0…

PriorityP270high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

82.26%

99.6th percentile

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 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).

Affected

6 ranges

Vendor	Product	Version range	Fixed in
oracle	weblogic_server	—	—
oracle	weblogic_server	—	—
oracle	weblogic_server	—	—
oracle_corporation	weblogic_server	—	—
oracle_corporation	weblogic_server	—	—
oracle_corporation	weblogic_server	—	—

Detection & IOCsextracted from sources · hover to see the quote

→CVE-2023-21931 is exploitable via the T3 protocol (and IIOP) against Oracle WebLogic Server — monitor/block T3 traffic on WebLogic listen ports (default 7001/7002) from untrusted networks ↗
→The vulnerability resides in the Core component of Oracle WebLogic Server; focus detection on T3/IIOP protocol abuse targeting WebLogic Core deserialization or data-access paths ↗
→No authentication is required to exploit this vulnerability — alert on any unauthenticated T3 or IIOP connections reaching WebLogic Server from external/untrusted sources ↗

·Affected versions are 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 — scope detection and patching efforts to these specific WebLogic Server versions ↗
·The attack vector is purely network-based with no privileges or user interaction required (CVSS AV:N/AC:L/PR:N/UI:N), meaning perimeter controls blocking T3/IIOP are the primary mitigation layer ↗
·Impact is limited to confidentiality (C:H) — no integrity or availability impact reported, but full data disclosure of all WebLogic-accessible data is possible ↗

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

vendor_oracle7.5HIGH

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