What is CVE-2018-2628?

CVE-2018-2628 is a critical-severity vulnerability in Oracle Weblogic Server, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2018-04-19.

How severe is CVE-2018-2628?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-2628 known to be exploited?

Yes. CVE-2018-2628 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-09-08), indicating it is being actively exploited. 163 public proof-of-concept repositories are indexed.

Deserialization in Oracle Weblogic Server

CVE-2018-2628

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).

Vulnerability class: Insecure Deserialization

Published 2018-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 1.000 (100.0th percentile), scored 2026-09-29.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 1.000 · newest: 1.000 · change: -0.000

Affected products

Oracle Weblogic Server — versions 10.3.6.0.0, 12.1.3.0.0, 12.2.1.2.0
Oracle Corporation Weblogic Server — versions 10.3.6.0, 12.1.3.0, 12.2.1.2

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-09-08. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-09-29.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

github.com/brianwrf/CVE-2018-2628 (Broken Link)
www.exploit-db.com/exploits/44553/ (Exploit, VDB Entry, Third Party Advisory, exploit)
www.securityfocus.com/bid/103776 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.securitytracker.com/id/1040696 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.exploit-db.com/exploits/46513/ (Exploit, VDB Entry, Third Party Advisory, exploit)
www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html (Patch, Vendor Advisory)
www.exploit-db.com/exploits/45193/ (Exploit, VDB Entry, Third Party Advisory, exploit)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2018-2628?: CVE-2018-2628 is a critical-severity vulnerability in Oracle Weblogic Server, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2018-04-19.
How severe is CVE-2018-2628?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-2628 known to be exploited?: Yes. CVE-2018-2628 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-09-08), indicating it is being actively exploited. 163 public proof-of-concept repositories are indexed.