Vulnerability-Lookup

FKIE_CVE-2020-8166

Vulnerability from fkie_nvd - Published: 2020-07-02 19:15 - Updated: 2026-06-17 03:25

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Summary

A CSRF forgery vulnerability exists in rails < 5.2.5, rails < 6.0.4 that makes it possible for an attacker to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token.

References

URL	Tags
support@hackerone.com	https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw	Mailing List, Patch, Third Party Advisory
support@hackerone.com	https://hackerone.com/reports/732415	Exploit, Third Party Advisory
support@hackerone.com	https://www.debian.org/security/2020/dsa-4766	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw	Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://hackerone.com/reports/732415	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.debian.org/security/2020/dsa-4766	Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://hackerone.com/reports/732415	Exploit, Third Party Advisory

Impacted products

Vendor	Product	Version
rubyonrails	rails	*
rubyonrails	rails	*
debian	debian_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "https://github.com/rails/rails",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in 5.2.4.3, 6.0.3.1"
            }
          ]
        }
      ],
      "source": "support@hackerone.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4357891D-A07C-4E1B-B540-92D6C477E7BB",
              "versionEndExcluding": "5.2.4.3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "12B5617A-91AC-4B94-BE1A-057DBF322808",
              "versionEndExcluding": "6.0.3.1",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A CSRF forgery vulnerability exists in rails \u003c 5.2.5, rails \u003c 6.0.4 that makes it possible for an attacker to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de falsificaci\u00f3n CSRF en rails versiones anteriores a 5.2.5, rails versiones anteriores a 6.0.4 que hace posible para un atacante, dado un token CSRF global como el presente en la etiqueta meta de authenticity_token, forjar un token CSRF per-form"
    }
  ],
  "id": "CVE-2020-8166",
  "lastModified": "2026-06-17T03:25:58.540",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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        "ssvcData": {
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          "options": [
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            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-28T15:45:41.140315Z",
          "version": "2.0.3"
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  },
  "published": "2020-07-02T19:15:12.513",
  "references": [
    {
      "source": "support@hackerone.com",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw"
    },
    {
      "source": "support@hackerone.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/732415"
    },
    {
      "source": "support@hackerone.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.debian.org/security/2020/dsa-4766"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Patch",
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      ],
      "url": "https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/732415"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.debian.org/security/2020/dsa-4766"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/732415"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ],
      "source": "support@hackerone.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-8166 (GCVE-0-2020-8166)

Vulnerability from cvelistv5 – Published: 2020-07-02 18:35 – Updated: 2026-04-28 15:45

Summary

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-28 15:45 UTC

CWE

CWE-352 - Cross-Site Request Forgery (CSRF) (CWE-352)

Assigner

hackerone mitre root

References

3 references

URL	Tags
https://hackerone.com/reports/732415	x_refsource_MISC
https://groups.google.com/g/rubyonrails-security/…	x_refsource_MISC
https://www.debian.org/security/2020/dsa-4766	vendor-advisoryx_refsource_DEBIAN

Impacted products

1 product

Vendor	Product	Version
n/a	https://github.com/rails/rails	Affected: Fixed in 5.2.4.3, 6.0.3.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T09:48:25.645Z",
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            "url": "https://hackerone.com/reports/732415"
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          {
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              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw"
          },
          {
            "name": "DSA-4766",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4766"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
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                "id": "CVE-2020-8166",
                "options": [
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                    "Exploitation": "poc"
                  },
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-28T15:45:41.140315Z",
                "version": "2.0.3"
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}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2020-8166

CVE-2020-8166 (GCVE-0-2020-8166)

Tags

Sightings

Nomenclature

Related by attack behaviour