Threats / Oracle / CVE-2020-2551
CVE-2020-2551
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Oracle Fusion Middleware vulnerability
Oracle Fusion Middleware WLS Core Components contains an unspecified vulnerability allowing unauthenticated network attackers to compromise WebLogic Server via IIOP protocol.
Verdict
Today item — known-exploited.
An unauthenticated remote attacker can exploit this vulnerability through the IIOP network interface to gain unauthorized access to WebLogic Server. The high EPSS score and confirmed wild exploitation indicate active threat activity.
CISA KEV Yes · 2023-11-165EPSS 0.93168 (verify live)6Exploit Weaponized · public PoC7CVSS 9.83CISA SSVC Exploitation: active · Automatable: yes · Impact: total4
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
6 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-16).
Probability (EPSS)
EPSS 0.93168 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) · Affected: Oracle, Fusion Middleware. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.0, set at disclosure.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 1401 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a public proof-of-concept / detection template). Catalog entries: nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify the target runs Oracle WebLogic Server and probe the IIOP network interface for accessibility.
Business
Exposed WebLogic infrastructure becomes discoverable to threat actors conducting reconnaissance.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I send a crafted IIOP request to the unpatched WLS Core Components to trigger the vulnerability without authentication.
Business
Security perimeter is breached without requiring valid credentials or user interaction.
3
Lateral reach — past segmentation narrative 3
Attacker
I gain code execution or system access within the WebLogic Server process and establish persistence.
Business
Critical middleware infrastructure is compromised, enabling lateral movement and data exfiltration.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05