FKIE_CVE-2021-36190

Vulnerability from fkie_nvd - Published: 2021-12-08 14:15 - Updated: 2026-06-17 03:58
Severity
5.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Summary
A unintended proxy or intermediary ('confused deputy') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows an unauthenticated attacker to access protected hosts via crafted HTTP requests.
References
psirt@fortinet.comhttps://fortiguard.com/advisory/FG-IR-21-123Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://fortiguard.com/advisory/FG-IR-21-123Patch, Vendor Advisory
Impacted products
Vendor Product Version
fortinet fortiweb *
fortinet fortiweb *
fortinet fortiweb *
fortinet fortiweb 6.1.0
fortinet fortiweb 6.1.1
fortinet fortiweb 6.1.2
fortinet fortiweb 6.4.0
fortinet fortiweb 6.4.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Fortinet FortiWeb",
          "vendor": "Fortinet",
          "versions": [
            {
              "status": "affected",
              "version": "FortiWeb 6.4.1, 6.4.0, 6.3.15, 6.3.14, 6.3.13, 6.3.12, 6.3.11, 6.3.10, 6.3.9, 6.3.8, 6.3.7, 6.3.6, 6.3.5, 6.3.4, 6.3.3, 6.3.2, 6.3.1, 6.3.0, 6.2.6, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 6.1.2, 6.1.1, 6.1.0, 6.0.7, 6.0.6, 6.0.5, 6.0.4, 6.0.3, 6.0.2, 6.0.1, 6.0.0"
            }
          ]
        }
      ],
      "source": "psirt@fortinet.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C5931460-A0F1-4BED-ADEF-A48602EA747C",
              "versionEndIncluding": "6.0.7",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5F9F1235-608A-4301-904F-8CA38A153E88",
              "versionEndIncluding": "6.2.6",
              "versionStartIncluding": "6.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F59449EE-C44E-4EE7-80DC-5194A9B5B4CD",
              "versionEndIncluding": "6.3.15",
              "versionStartIncluding": "6.3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:6.1.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "96B929BB-7B7A-40D2-AB13-D4FDD41FD159",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:6.1.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "1A3C5370-3453-4F07-B551-7E36F815578C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:6.1.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "415AF153-2A59-488B-A78B-D98B7F39B5AF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:6.4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "74A92A08-E6F6-4522-A6DA-061950AD3525",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:6.4.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "A6A3D2C4-C3FA-4E12-9156-DAFEA4E00BCC",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A unintended proxy or intermediary (\u0027confused deputy\u0027) in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows an unauthenticated attacker to access protected hosts via crafted HTTP requests."
    },
    {
      "lang": "es",
      "value": "Un proxy o intermediario no intencionado (\"confused deputy\") en Fortinet FortiWeb versi\u00f3n 6.4.1 y anteriores, 6.3.15 y anteriores, permite a un atacante no autenticado acceder a hosts protegidos por medio de peticiones HTTP dise\u00f1adas"
    }
  ],
  "id": "CVE-2021-36190",
  "lastModified": "2026-06-17T03:58:29.710",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 3.4,
        "source": "psirt@fortinet.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-36190",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-10-23T13:57:38.578236Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-12-08T14:15:09.527",
  "references": [
    {
      "source": "psirt@fortinet.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://fortiguard.com/advisory/FG-IR-21-123"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://fortiguard.com/advisory/FG-IR-21-123"
    }
  ],
  "sourceIdentifier": "psirt@fortinet.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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