GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-21640 (GCVE-0-2021-21640)

Vulnerability from cvelistv5 – Published: 2021-04-07 13:50 – Updated: 2024-08-03 18:16
VLAI
Summary
Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name, allowing attackers with View/Create permission to create views with invalid or already-used names.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Assigner
References
Impacted products
Vendor Product Version CPE status
Jenkins project Jenkins Affected: unspecified , ≤ 2.286 (custom)
Affected: unspecified , ≤ LTS 2.277.1 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:16:23.813Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871"
          },
          {
            "name": "[oss-security] 20210407 Multiple vulnerabilities in Jenkins and Jenkins plugins",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/04/07/2"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Jenkins",
          "vendor": "Jenkins project",
          "versions": [
            {
              "lessThanOrEqual": "2.286",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "LTS 2.277.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name, allowing attackers with View/Create permission to create views with invalid or already-used names."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-24T15:51:03.643Z",
        "orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
        "shortName": "jenkins"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871"
        },
        {
          "name": "[oss-security] 20210407 Multiple vulnerabilities in Jenkins and Jenkins plugins",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/04/07/2"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "jenkinsci-cert@googlegroups.com",
          "ID": "CVE-2021-21640",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Jenkins",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "2.286"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "LTS 2.277.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Jenkins project"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name, allowing attackers with View/Create permission to create views with invalid or already-used names."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-240: Improper Handling of Inconsistent Structural Elements"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871",
              "refsource": "CONFIRM",
              "url": "https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871"
            },
            {
              "name": "[oss-security] 20210407 Multiple vulnerabilities in Jenkins and Jenkins plugins",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/04/07/2"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
    "assignerShortName": "jenkins",
    "cveId": "CVE-2021-21640",
    "datePublished": "2021-04-07T13:50:14.000Z",
    "dateReserved": "2021-01-04T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:16:23.813Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-21640",
      "date": "2026-09-10",
      "epss": "0.01905",
      "percentile": "0.785"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*\", \"versionEndIncluding\": \"2.277.1\", \"matchCriteriaId\": \"A6C9D710-02B7-4F94-BACA-70D67286F99B\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*\", \"versionEndIncluding\": \"2.286\", \"matchCriteriaId\": \"11CD124B-104D-48B7-A184-97EFC77893AA\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name, allowing attackers with View/Create permission to create views with invalid or already-used names.\"}, {\"lang\": \"es\", \"value\": \"Jenkins 2.286 y versiones anteriores, LTS versiones 2.277.1 y anteriores, no comprueban apropiadamente a una visualizaci\\u00f3n reci\\u00e9n dise\\u00f1ada tener un nombre permitido, permitiendo a atacantes con permiso de View/Create crear visualizaciones con nombres no v\\u00e1lidos o ya usados\"}]",
      "id": "CVE-2021-21640",
      "lastModified": "2024-11-21T05:48:45.000",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 1.4}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:S/C:N/I:P/A:N\", \"baseScore\": 4.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"SINGLE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 8.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-04-07T14:15:17.017",
      "references": "[{\"url\": \"http://www.openwall.com/lists/oss-security/2021/04/07/2\", \"source\": \"jenkinsci-cert@googlegroups.com\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871\", \"source\": \"jenkinsci-cert@googlegroups.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/04/07/2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "jenkinsci-cert@googlegroups.com",
      "vulnStatus": "Modified"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-21640\",\"sourceIdentifier\":\"jenkinsci-cert@googlegroups.com\",\"published\":\"2021-04-07T14:15:17.017\",\"lastModified\":\"2024-11-21T05:48:45.000\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name, allowing attackers with View/Create permission to create views with invalid or already-used names.\"},{\"lang\":\"es\",\"value\":\"Jenkins 2.286 y versiones anteriores, LTS versiones 2.277.1 y anteriores, no comprueban apropiadamente a una visualizaci\u00f3n reci\u00e9n dise\u00f1ada tener un nombre permitido, permitiendo a atacantes con permiso de View/Create crear visualizaciones con nombres no v\u00e1lidos o ya usados\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:N/I:P/A:N\",\"baseScore\":4.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*\",\"versionEndIncluding\":\"2.277.1\",\"matchCriteriaId\":\"A6C9D710-02B7-4F94-BACA-70D67286F99B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*\",\"versionEndIncluding\":\"2.286\",\"matchCriteriaId\":\"11CD124B-104D-48B7-A184-97EFC77893AA\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2021/04/07/2\",\"source\":\"jenkinsci-cert@googlegroups.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871\",\"source\":\"jenkinsci-cert@googlegroups.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2021/04/07/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:11:41+00:00",
      "cve": "CVE-2021-21640",
      "id": "CVE-2021-21640",
      "initial_release_date": "2021-04-07T00:00:00+00:00",
      "product_status:fixed": "4",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "421",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "jenkins: view name validation bypass",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21640.json",
      "version": "3"
    }
  }
}