{
  "id": "CVE-2018-13383",
  "url": "https://spydr.io/cve/CVE-2018-13383",
  "published": "2019-05-29T18:29:00.693Z",
  "modified": "2026-06-17T01:39:18.710Z",
  "score": 6.5,
  "severity": "medium",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "score_source": "NVD",
  "epss": 0.33647,
  "epss_percentile": 0.9835,
  "exploited": true,
  "kev": {
    "added": "2022-01-10",
    "due": "2022-07-10",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Known",
    "name": "Fortinet FortiOS and FortiProxy Out-of-bounds Write",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-13383"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Fortinet"
  ],
  "products": [
    "Fortinet FortiOS and FortiProxy"
  ],
  "cwes": [
    "CWE-787"
  ],
  "description": "A heap buffer overflow in Fortinet FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, 5.2.14 and earlier and FortiProxy 2.0.0, 1.2.8 and earlier in the SSL VPN web portal may cause the SSL VPN web service termination for logged in users due to a failure to properly handle javascript href data when proxying webpages.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 6.5,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://fortiguard.com/advisory/FG-IR-18-388",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://fortiguard.com/advisory/FG-IR-20-229",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-13383",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2018-13383",
  "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."
    }
  ]
}