{
  "cveId": "CVE-2019-1257",
  "url": "https://patchblox.com/security/cve/CVE-2019-1257",
  "summary": "CVE-2019-1257 is fixed in 4 products on 1 platform, first by KB4475590, released September 10, 2019. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.",
  "title": "Microsoft SharePoint Remote Code Execution Vulnerability",
  "description": "\u003Cp\u003EA remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.\u003C/p\u003E\n\u003Cp\u003EExploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.\u003C/p\u003E",
  "published": "2019-09-10T12:00:00Z",
  "severity": "Critical",
  "epss": 0.11753,
  "epssPercentile": 0.96097,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation More Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1257",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Enterprise Server 2016",
      "fixedVersion": "",
      "fix": "KB4475590",
      "url": "https://patchblox.com/security/fix/microsoft/kb4475590",
      "released": "2019-09-10T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Foundation 2010 Service Pack 2",
      "fixedVersion": "",
      "fix": "KB4475605",
      "url": "https://patchblox.com/security/fix/microsoft/kb4475605",
      "released": "2019-09-10T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Foundation 2013 Service Pack 1",
      "fixedVersion": "",
      "fix": "KB4484098",
      "url": "https://patchblox.com/security/fix/microsoft/kb4484098",
      "released": "2019-09-10T12:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft SharePoint Server 2019",
      "fixedVersion": "",
      "fix": "KB4475596",
      "url": "https://patchblox.com/security/fix/microsoft/kb4475596",
      "released": "2019-09-10T12:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}