Security Digest · Vulnerability record · Known exploited
CVE-2020-2551: Oracle Fusion Middleware Unspecified Vulnerability
Exploited in the wild (CISA KEV). Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components).
CISA KEV · added 2023-11-16 CVSS 9.8 Critical EPSS 92.8% · p99.8
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Oracle Fusion Middleware. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2023-11-16, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2023-12-07; treat that as the outer limit, not the target.
- EPSS 92.8%, percentile 99.8: FIRST’s model estimates a 92.8% chance of exploitation activity in the next 30 days, higher than 99.8% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
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).
CISA’s summary
Oracle Fusion Middleware contains an unspecified vulnerability in the WLS Core Components that allows an unauthenticated attacker with network access via IIOP to compromise the WebLogic Server.
Product: Oracle Fusion Middleware · Assigned by: oracle · Published: 2020-01-15
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Oracle Corporation | WebLogic Server | 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| oracle | 3.0 | 9.8 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2023-11-16; federal due date 2023-12-07. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 92.82% probability of exploitation activity in the next 30 days; percentile 99.8.
Timeline
- — CVE record published by oracle
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (oracle.com) oracle.com
Vulnerability records
- CVE.org record CVE-2020-2551 cve.org
- NVD entry CVE-2020-2551 nvd.nist.gov
Government
All exploited Oracle vulnerabilities · Today’s Security Digest