{
  "id": "CVE-2016-4437",
  "url": "https://spydr.io/cve/CVE-2016-4437",
  "published": "2016-06-07T14:06:13.247Z",
  "modified": "2026-06-17T00:47:33.310Z",
  "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": 0.93039,
  "epss_percentile": 0.99833,
  "exploited": true,
  "kev": {
    "added": "2021-11-03",
    "due": "2022-05-03",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Unknown",
    "name": "Apache Shiro Code Execution Vulnerability",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2016-4437"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "apache",
    "redhat"
  ],
  "products": [
    "apache aurora",
    "apache shiro",
    "redhat fuse",
    "redhat jboss middleware text-only advisories"
  ],
  "cwes": [
    "CWE-321"
  ],
  "description": "Apache Shiro before 1.2.5, when a cipher key has not been configured for the \"remember me\" feature, allows remote attackers to execute arbitrary code or bypass intended access restrictions via an unspecified request parameter.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "http://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.html",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.html",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2035.html",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2036.html",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.securityfocus.com/archive/1/538570/100/0/threaded",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://www.securityfocus.com/bid/91024",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "https://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3E",
      "tags": [
        "Mailing List"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2016-4437",
  "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."
    }
  ]
}