{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2013-0156",
  "revision": 1,
  "title": "Ruby on Rails — Type Casting in Request Parsing to Code Execution",
  "summary": "Rails converts structured request bodies into objects without restricting the types, so an unauthenticated request builds whatever the attacker names and runs code on the server.",
  "source_type": "cve",
  "severity": "critical",
  "epss": 0.99449,
  "exploitation": {
    "known_exploited": false,
    "exploit_available": false,
    "attack_complexity": "low",
    "prerequisites": "Network access to the application"
  },
  "remediation": {
    "patch_available": true,
    "fixed_in": [
      "Rails 2.3.15",
      "Rails 3.0.19",
      "Rails 3.1.10",
      "Rails 3.2.11"
    ]
  },
  "mitre_attack": [
    "T1190"
  ],
  "kill_chain": "initial_access",
  "recommended_action": "Upgrade Rails past 2.3.15, 3.0.19, 3.1.10 or 3.2.11, and rebuild applications that were reachable.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2013-0156",
      "retrieved_at": "2026-08-07T17:04:30.741Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2013-0156",
      "retrieved_at": "2026-08-07T17:04:30.741Z",
      "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-2013-0156",
      "retrieved_at": "2026-08-07T17:04:30.741Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-0156",
      "label": "NVD record"
    },
    {
      "type": "vendor_advisory",
      "url": "http://weblog.rubyonrails.org/2013/1/28/Rails-3-0-20-and-2-3-16-have-been-released/"
    },
    {
      "type": "writeup",
      "url": "http://ics-cert.us-cert.gov/advisories/ICSA-13-036-01A"
    },
    {
      "type": "writeup",
      "url": "http://lists.apple.com/archives/security-announce/2013/Mar/msg00002.html"
    },
    {
      "type": "writeup",
      "url": "http://rhn.redhat.com/errata/RHSA-2013-0153.html"
    }
  ],
  "published_at": "2013-01-13T22:55:00.947Z",
  "issued_at": "2026-08-07T17:04:30.741Z",
  "tags": [
    "ruby-on-rails",
    "deserialization",
    "web-framework"
  ]
}