CVE-2018-2628 Oracle WebLogic Server Unspecified

Exploited in the wild Critical 9.8 Published 19 Apr 2018 Updated 21 Oct 2025

Unauthenticated attackers can achieve remote code execution and full server takeover via T3 protocol deserialization flaws in WebLogic Server.

Exploited in the wild: Since 8 Sep 2022
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-2628?

CVE-2018-2628 is a critical unsafe deserialization vulnerability in Oracle Weblogic Server, published on 19 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: WLS Core Components). Supported versions that are affected are 10.3.6.0, 12.1.3.0, 12.2.1.2 and 12.2.1.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3 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).

Weakness: CWE-502

Which versions are affected by CVE-2018-2628?

It affects 1 product.

Products include Oracle Weblogic Server.

How do I fix CVE-2018-2628?

No fix has been published for CVE-2018-2628 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 29 Sep 2022.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2018-2628 being exploited?

Yes. Attackers have exploited CVE-2018-2628 in the wild since at least 8 Sep 2022.

Public exploit code: 1 Metasploit module, 4 Exploit-DB entries, 1 Nuclei template and 21 proofs of concept on GitHub.

All Oracle Weblogic Server vulnerabilities

Sources

Also known as GHSA-882j-m7wv-38p6.