CVE-2020-2883: Oracle WebLogic Server Unspecified Vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). 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, 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).
Description quoted from the CVE record (assigned by oracle, published 2020-04-15).
How it can be exploited
Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: yes. Technical impact: total.
- On CISA KEV since
- 2025-01-07
- US federal deadline
- 2025-01-28
- Ransomware use
- Not known
Public exploit evidence (Exploit Observer)
Also known as: BDU:2020-02538, CNNVD-202004-814, CNVD-2020-23015, EUVD-2020-22676, GHSA-9x8q-p3qp-r24w, ZDI-20-504, ZDI-20-570
VEDAS cluster: VEDAS:BEECHWOOD
Exploit Observer links 6 pieces of public exploit code or detection modules that name this CVE or one of its aliases.
Exploit code and modules (6)
Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.
- Nuclei template: https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/main/javascript/cves/2020/CVE-2020-2883.yaml
- Code repository: https://github.com/fancydoessecurity/cve-2020-2883
- Code repository: https://github.com/magiczer0/weblogic_cve-2020-2883_poc
- Code repository: https://github.com/qynklee/poc_cve-2020-2883
- Code repository: https://github.com/y4er/cve-2020-2883
- Code repository: https://github.com/zzzwd/cve-2020-2883
Research and write-ups (4)
- Research or write-up: https://seguranca-informatica.pt/oracle-alerta-que-rce-do-weblogic-tem-sido-explorado-in-the-wild-cve-2020-2883/#.XrAoDf5saDc.reddit
- Research or write-up: https://www.rapid7.com/db/vulnerabilities/oracle-weblogic-cve-2020-2883
- Research or write-up: https://www.zerodayinitiative.com/advisories/ZDI-20-504
- Research or write-up: https://www.zerodayinitiative.com/advisories/ZDI-20-570
Vulnerability databases and vendor advisories (8)
Catalogue entries, not exploit evidence.
- Vulnerability database or vendor advisory: https://access.redhat.com/security/cve/cve-2020-2883
- Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2020-22676
- Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-9x8q-p3qp-r24w
- Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-2883
- Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2883
- Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202004-814
- Vulnerability database or vendor advisory: https://www.cnvd.org.cn/flaw/show/CNVD-2020-23015
- Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2020-2883
248 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.
VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.
Live scores
- EPSS
- 0.946
very likely to be attacked soon - VEDAS
- 0.982
strong exploit evidence - On CISA KEV
- Yes, since 2025-01-07
- Detection rule
- None yet
Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Oracle Corporation WebLogic Server | version 10.3.6.0.0 version 12.1.3.0.0 version 12.2.1.3.0 version 12.2.1.4.0 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
Exploit Observer also maps it to: oracle weblogic_server, oracle_corp. weblogic_server.
How to fix it
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor guidance:
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://nvd.nist.gov/vuln/detail/CVE-2020-2883
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
References
Government sources
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2883 (government-resource)
Other references
- https://www.oracle.com/security-alerts/cpuapr2020.html (x_refsource_MISC)
- https://www.zerodayinitiative.com/advisories/ZDI-20-504/ (x_refsource_MISC)
- https://www.zerodayinitiative.com/advisories/ZDI-20-570/ (x_refsource_MISC)
- http://packetstormsecurity.com/files/157950/WebLogic-Server-Deserialization-Remote-Code-Execution.html (x_refsource_MISC)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.