Oracle WebLogic Server Unauthenticated Remote Takeover via IIOP
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
Immediately restrict network access to the IIOP port(s) (e.g., 7001) of affected WebLogic Servers, allowing connections only from trusted internal networks or specific IP addresses. If IIOP is not actively required for your environment, consider disabling the IIOP protocol on the WebLogic Server instances. Enhance monitoring for unusual IIOP traffic patterns or suspicious activities on the server.
The permanent resolution is to apply the latest Oracle Critical Patch Update (CPU) that specifically addresses CVE-2020-2551 for the affected WebLogic Server versions. Upgrade all vulnerable instances, including versions 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, and 12.2.1.4.0, to the patched release recommended by Oracle. Refer to Oracle's official security advisories for precise patch details and installation instructions.
An unauthenticated attacker can easily exploit this critical vulnerability via network access using IIOP to completely compromise the Oracle WebLogic Server. This allows for a full takeover, impacting the confidentiality, integrity, and availability of all hosted applications and data. The consequences include potential data breaches, unauthorized system modification, and complete service disruption.
No CWE classification has been assigned.
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Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Console). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 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 HTTP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
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