Vulnerability-Lookup

FKIE_CVE-2021-21429

Vulnerability from fkie_nvd - Published: 2021-04-27 20:15 - Updated: 2026-06-17 03:35

Severity

4.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

OpenAPI Generator allows generation of API client libraries, server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. OpenAPI Generator maven plug-in creates insecure temporary files during the process. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.

References

URL	Tags
security-advisories@github.com	https://github.com/OpenAPITools/openapi-generator/pull/8795	Patch, Third Party Advisory
security-advisories@github.com	https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-867q-77cc-98mv	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/OpenAPITools/openapi-generator/pull/8795	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-867q-77cc-98mv	Patch, Third Party Advisory

Impacted products

	Vendor	Product	Version
	openapi-generator	openapi_generator	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "openapi-generator",
          "vendor": "OpenAPITools",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.1.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openapi-generator:openapi_generator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E271BD89-5082-49B0-85BB-39B7AE2792BB",
              "versionEndExcluding": "5.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenAPI Generator allows generation of API client libraries, server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. OpenAPI Generator maven plug-in creates insecure temporary files during the process. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version."
    },
    {
      "lang": "es",
      "value": "OpenAPI Generator permite la generaci\u00f3n de bibliotecas cliente API, stubs de servidor, documentaci\u00f3n y configuraci\u00f3n de forma autom\u00e1tica dada una especificaci\u00f3n OpenAPI.\u0026#xa0;El uso de la funci\u00f3n \"File.createTempFile\" en JDK dar\u00e1 como resultado la creaci\u00f3n y el uso de archivos temporales no seguros que pueden dejar la aplicaci\u00f3n y los datos del sistema vulnerables a ataques.\u0026#xa0;El plugin Maven de OpenAPI Generator crea archivos temporales no seguros durante el proceso.\u0026#xa0;El problema ha sido parcheado con \"Files.createTempFile\" y es lanzado en versi\u00f3n estable v5.1.0"
    }
  ],
  "id": "CVE-2021-21429",
  "lastModified": "2026-06-17T03:35:33.533",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.1,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.0,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-04-27T20:15:08.763",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/OpenAPITools/openapi-generator/pull/8795"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-867q-77cc-98mv"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/OpenAPITools/openapi-generator/pull/8795"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-867q-77cc-98mv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

CVE-2021-21429 (GCVE-0-2021-21429)

Vulnerability from cvelistv5 – Published: 2021-04-27 20:00 – Updated: 2024-08-03 18:09

Title

Creation of Temporary File in Directory with Insecure Permissions in the OpenAPI Generator Maven plugin

Summary

Severity

4 (Medium)


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

CWE

CWE-552 - Files or Directories Accessible to External Parties

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/OpenAPITools/openapi-generator…	x_refsource_CONFIRM
https://github.com/OpenAPITools/openapi-generator…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
OpenAPITools	openapi-generator	Affected: < 5.1.0

Show details on NVD website

JSON

To clipboard

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      "metrics": [
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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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.