CVE-2020-2883
Confirmed PUBLISHEDVulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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).
- CVE Published
- Apr 15, 2020
- Exploitation Reported
- Jan 07, 2025
- CVSS
- 9.8 Critical
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Oracle Corporation |
WebLogic Server
|
10.3.6.0.0 |
Affected |
| Oracle Corporation |
WebLogic Server
|
12.1.3.0.0 |
Affected |
| Oracle Corporation |
WebLogic Server
|
12.2.1.3.0 |
Affected |
| Oracle Corporation |
WebLogic Server
|
12.2.1.4.0 |
Affected |
CVE References
- oracle.com/security-alerts/cpuapr2020.html oracle.com · CVE Record https://www.oracle.com/security-alerts/cpuapr2020.html
- zerodayinitiative.com/advisories/ZDI-20-504 zerodayinitiative.com · CVE Record https://www.zerodayinitiative.com/advisories/ZDI-20-504/
- zerodayinitiative.com/advisories/ZDI-20-570 zerodayinitiative.com · CVE Record https://www.zerodayinitiative.com/advisories/ZDI-20-570/
- packetstormsecurity.com/files/157950/WebLogic-Server-Deserialization... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/157950/WebLogic-Server-Deseriali...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2025-01-07 00:00 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2020/CVE-2020-2883.yaml | Jun 01, 2026 |
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/misc/weblogic_deserialize_badattr_extcomp.rb | Apr 28, 2025 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2025-01-07 00:00:00 UTC · CISA
Proof of concept available
Recorded 2020-05-10 09:04:43 UTC · GitHub
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2020/CVE-2020-2883.yaml | Jun 01, 2026 |
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/misc/weblogic_deserialize_badattr_extcomp.rb | Apr 28, 2025 |
| Nessus | https://www.tenable.com/plugins/nessus/138074 | Mar 08, 2023 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2020-10-14 23:12:39 UTC · 2 stars
github · Created 2020-05-13 09:56:48 UTC · 15 stars
Proof of concept for Weblogic CVE-2020-2883
nuclei · Created Unknown
metasploit · Created Unknown
Metasploit module for CVE-2020-2883
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
15:34 UTC about 2 months ago15:34 UTC · about 2 months ago
Nuclei template available
Scanner coverage available
-
15:02 UTC about 1 year ago15:02 UTC · about 1 year ago
Metasploit module available
Exploit module available
-
00:00 UTC over 1 year ago00:00 UTC · over 1 year ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
01:05 UTC over 3 years ago01:05 UTC · over 3 years ago
Nessus plugin available
Scanner coverage available
-
09:04 UTC about 6 years ago09:04 UTC · about 6 years ago
Public PoC available
Public proof-of-concept code published
-
13:29 UTC over 6 years ago13:29 UTC · over 6 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC over 6 years ago00:00 UTC · over 6 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2020-2883
{
"cve_id": "CVE-2020-2883",
"title": "Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middlewa...",
"affected_vendor": "Oracle Corporation",
"affected_product": "WebLogic Server",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}