{
  "id": "CVE-2019-9874",
  "url": "https://spydr.io/cve/CVE-2019-9874",
  "published": "2019-05-31T21:29:06.123Z",
  "modified": "2026-06-17T02:44:46.077Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.83736,
  "epss_percentile": 0.99684,
  "exploited": true,
  "kev": {
    "added": "2025-03-26",
    "due": "2025-04-16",
    "action": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Unknown",
    "name": "Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability",
    "notes": "https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "sitecore"
  ],
  "products": [
    "sitecore cms",
    "sitecore experience platform"
  ],
  "cwes": [
    "CWE-502"
  ],
  "description": "Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://dev.sitecore.net/Downloads.aspx",
      "tags": [
        "Product",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.synacktiv.com/blog.html",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf",
      "tags": [
        "Exploit",
        "Patch",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9874",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9874",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}