{"api_version":"1","generated_at":"2026-07-15T14:12:36+00:00","cve":"CVE-2021-45457","urls":{"html":"https://cve.report/CVE-2021-45457","api":"https://cve.report/api/cve/CVE-2021-45457.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-45457","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-45457"},"summary":{"title":"CVE-2021-45457","description":"In Apache Kylin, Cross-origin requests with credentials are allowed to be sent from any origin. This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.","state":"PUBLIC","assigner":"security@apache.org","published_at":"2022-01-06 13:15:00","updated_at":"2022-07-12 17:42:00"},"problem_types":["CWE-863"],"metrics":[],"references":[{"url":"https://lists.apache.org/thread/rzv4mq58okwj1n88lry82ol2wwm57q1m","name":"https://lists.apache.org/thread/rzv4mq58okwj1n88lry82ol2wwm57q1m","refsource":"MISC","tags":[],"title":"","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"http://www.openwall.com/lists/oss-security/2022/01/06/2","name":"[oss-security] 20220106 CVE-2021-45457: Apache Kylin: Overly broad CORS configuration","refsource":"MLIST","tags":[],"title":"oss-security - CVE-2021-45457: Apache Kylin: Overly broad CORS configuration","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-45457","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45457","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"LEGACY","value":"Alvaro Munoz <pwntester@github.com>","lang":""}],"nvd_cpes":[{"cve_year":"2021","cve_id":"45457","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"kylin","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"45457","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"kylin","cpe6":"4.0.0","cpe7":"-","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"45457","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"kylin","cpe6":"4.0.0","cpe7":"alpha","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"45457","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"kylin","cpe6":"4.0.0","cpe7":"beta","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"45457","vulnerable":"1","versionEndIncluding":"2.6.6","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"kylin","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security@apache.org","ID":"CVE-2021-45457","STATE":"PUBLIC","TITLE":"Overly broad CORS configuration "},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Apache Kylin","version":{"version_data":[{"version_affected":"<=","version_name":"Apache Kylin 2","version_value":"2.6.6"},{"version_affected":"<=","version_name":"Apache Kylin 3","version_value":"3.1.2"},{"version_affected":"<=","version_name":"Apache Kylin 4","version_value":"4.0.0"}]}}]},"vendor_name":"Apache Software Foundation"}]}},"credit":[{"lang":"eng","value":"Alvaro Munoz <pwntester@github.com>"}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In Apache Kylin, Cross-origin requests with credentials are allowed to be sent from any origin. This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions."}]},"generator":{"engine":"Vulnogram 0.0.9"},"impact":[{"other":"moderate"}],"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CORS"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://lists.apache.org/thread/rzv4mq58okwj1n88lry82ol2wwm57q1m","name":"https://lists.apache.org/thread/rzv4mq58okwj1n88lry82ol2wwm57q1m"},{"refsource":"MLIST","name":"[oss-security] 20220106 CVE-2021-45457: Apache Kylin: Overly broad CORS configuration","url":"http://www.openwall.com/lists/oss-security/2022/01/06/2"}]},"source":{"discovery":"UNKNOWN"},"work_around":[{"lang":"eng","value":"\nKylin reflects the `Origin` header and allow credentials to be sent cross-origin in the default configuration. The preflight OPTIONS request:\n```\nOPTIONS /kylin/api/projects HTTP/1.1\nHost: localhost:7070\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:94.0) Gecko/20100101 Firefox/94.0\nAccept: */*\nAccept-Language: en-US\nAccept-Encoding: gzip, deflate\nAccess-Control-Request-Method: POST\nAccess-Control-Request-Headers: content-type\nReferer: http://b49b-95-62-58-48.ngrok.io/\nOrigin: http://b49b-95-62-58-48.ngrok.io\nConnection: keep-alive\nCache-Control: max-age=0\n```\n\nWill be replied with:\n\n```\nHTTP/1.1 200 OK\nServer: Apache-Coyote/1.1\nAccess-Control-Allow-Origin: http://b49b-95-62-58-48.ngrok.io\nAccess-Control-Allow-Credentials: true\nVary: Origin\nAccess-Control-Allow-Methods: DELETE, POST, GET, OPTIONS, PUT\nAccess-Control-Allow-Headers: Authorization, Origin, No-Cache, X-Requested-With, Cache-Control, Accept, X-E4m-With, If-Modified-Since, Pragma, Last-Modified, Expires, Content-Type\nContent-Length: 0\n```\n\nUsers of Kylin 2.x & Kylin 3.x should upgrade to 3.1.3 or apply patch https://github.com/apache/kylin/pull/1782.\nUsers of Kylin 4.x should upgrade to 4.0.1 or apply patch https://github.com/apache/kylin/pull/1781."}]},"nvd":{"publishedDate":"2022-01-06 13:15:00","lastModifiedDate":"2022-07-12 17:42:00","problem_types":["CWE-863"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:kylin:4.0.0:alpha:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:kylin:4.0.0:beta:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:kylin:4.0.0:-:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.0","versionEndExcluding":"3.1.3","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0.0","versionEndIncluding":"2.6.6","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"45457","Ordinal":"223589","Title":"CVE-2021-45457","CVE":"CVE-2021-45457","Year":"2021"},"notes":[]}}}