{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2020-2883",
  "revision": 1,
  "title": "Oracle WebLogic Server — unauthenticated takeover over T3 (2020)",
  "summary": "Oracle WebLogic Server 10.3.6, 12.1.3, 12.2.1.3 and 12.2.1.4 let an unauthenticated attacker who can reach the T3 or object-request-broker ports take the server over. Oracle does not say which flaw.",
  "source_type": "cve",
  "severity": "critical",
  "cvss": {
    "score": 9.8,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.94928,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "low",
    "kev_added": "2025-01-07",
    "prerequisites": "Network access to the T3 or object-request-broker listener; no credentials needed."
  },
  "remediation": {
    "patch_available": true
  },
  "kill_chain": "initial_access",
  "recommended_action": "Apply Oracle's April 2020 Critical Patch Update now; block the T3 and object-request-broker ports at the edge — they should never face the internet.",
  "confidence": "medium",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2020-2883",
      "retrieved_at": "2026-09-24T12:03:01.274Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-24T12:03:01.274Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2020-2883",
      "retrieved_at": "2026-09-24T12:03:01.274Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2020-2883",
      "retrieved_at": "2026-09-24T12:03:01.274Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-2883",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
    },
    {
      "type": "writeup",
      "url": "http://packetstormsecurity.com/files/157950/WebLogic-Server-Deserialization-Remote-Code-Execution.html"
    },
    {
      "type": "writeup",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-20-504/"
    }
  ],
  "published_at": "2020-04-15T14:15:33.513Z",
  "issued_at": "2026-09-24T12:03:01.274Z",
  "tags": [
    "oracle",
    "weblogic",
    "middleware",
    "remote-code-execution",
    "kev"
  ]
}