Vulnerability-Lookup

OESA-2024-2198 (CVE-2024-6221)

Vulnerability from osv_openeuler – Published: 2024-09-27 11:07 – Updated: 2026-08-06 11:07 – Source website

Summary

python-Flask-Cors security update

Details

A Flask extension for handling Cross Origin Resource Sharing (CORS), making cross-origin AJAX possible.

Security Fix(es):

A vulnerability in corydolphin/flask-cors version 4.0.1 allows the Access-Control-Allow-Private-Network CORS header to be set to true by default, without any configuration option. This behavior can expose private network resources to unauthorized external access, leading to significant security risks such as data breaches, unauthorized access to sensitive information, and potential network intrusions.(CVE-2024-6221)

Severity

7.5 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2024-6221	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "noarch": [
          "python-Flask-Cors-help-5.0.0-1.oe2403.noarch.rpm",
          "python3-Flask-Cors-5.0.0-1.oe2403.noarch.rpm"
        ],
        "src": [
          "python-Flask-Cors-5.0.0-1.oe2403.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "python-Flask-Cors",
        "purl": "pkg:rpm/openEuler/python-Flask-Cors\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.0.0-1.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "A Flask extension for handling Cross Origin Resource Sharing (CORS), making cross-origin AJAX possible.\r\n\r\nSecurity Fix(es):\r\n\r\nA vulnerability in corydolphin/flask-cors version 4.0.1 allows the `Access-Control-Allow-Private-Network` CORS header to be set to true by default, without any configuration option. This behavior can expose private network resources to unauthorized external access, leading to significant security risks such as data breaches, unauthorized access to sensitive information, and potential network intrusions.(CVE-2024-6221)",
  "id": "OESA-2024-2198",
  "modified": "2026-08-06T11:07:40Z",
  "published": "2024-09-27T11:07:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-2198"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6221"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python-Flask-Cors security update",
  "upstream": [
    "CVE-2024-6221"
  ]
}

CVE-2024-6221 (GCVE-0-2024-6221)

Vulnerability from cvelistv5 – Published: 2024-08-18 18:58 – Updated: 2025-04-07 15:03

Title

Improper Access Control in corydolphin/flask-cors

Summary

A vulnerability in corydolphin/flask-cors version 4.0.1 allows the `Access-Control-Allow-Private-Network` CORS header to be set to true by default. This behavior can expose private network resources to unauthorized external access, leading to significant security risks such as data breaches, unauthorized access to sensitive information, and potential network intrusions.

Severity

6.5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-08-19 13:46 UTC

CWE

CWE-284 - Improper Access Control

Assigner

@huntr_ai mitre root

References

2 references

URL	Tags
https://huntr.com/bounties/a42935fc-6f57-4818-bca…
https://github.com/corydolphin/flask-cors/commit/…

Impacted products

2 products

Vendor	Product	Version
corydolphin	corydolphin/flask-cors	Affected: unspecified , < 5.0.0 (custom)
corydolphin	flask-cors	Affected: 4.0.1 , < * (custom) cpe:2.3:a:corydolphin:flask-cors:4.0.1:::::::*

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:corydolphin:flask-cors:4.0.1:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "flask-cors",
            "vendor": "corydolphin",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "4.0.1",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-6221",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-19T13:46:09.049560Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-19T13:48:13.411Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "corydolphin/flask-cors",
          "vendor": "corydolphin",
          "versions": [
            {
              "lessThan": "5.0.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in corydolphin/flask-cors version 4.0.1 allows the `Access-Control-Allow-Private-Network` CORS header to be set to true by default. This behavior can expose private network resources to unauthorized external access, leading to significant security risks such as data breaches, unauthorized access to sensitive information, and potential network intrusions."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-04-07T15:03:37.262Z",
        "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
        "shortName": "@huntr_ai"
      },
      "references": [
        {
          "url": "https://huntr.com/bounties/a42935fc-6f57-4818-bca4-3d528235df4d"
        },
        {
          "url": "https://github.com/corydolphin/flask-cors/commit/03aa3f8e2256437f7bad96422a747b98ab5e31bf"
        }
      ],
      "source": {
        "advisory": "a42935fc-6f57-4818-bca4-3d528235df4d",
        "discovery": "EXTERNAL"
      },
      "title": "Improper Access Control in corydolphin/flask-cors"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
    "assignerShortName": "@huntr_ai",
    "cveId": "CVE-2024-6221",
    "datePublished": "2024-08-18T18:58:20.551Z",
    "dateReserved": "2024-06-20T18:32:12.417Z",
    "dateUpdated": "2025-04-07T15:03:37.262Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.
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OESA-2024-2198 (CVE-2024-6221)

CVE-2024-6221 (GCVE-0-2024-6221)

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