{"api_version":"1","generated_at":"2026-04-22T22:48:57+00:00","cve":"CVE-2020-28724","urls":{"html":"https://cve.report/CVE-2020-28724","api":"https://cve.report/api/cve/CVE-2020-28724.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-28724","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-28724"},"summary":{"title":"CVE-2020-28724","description":"Open redirect vulnerability in werkzeug before 0.11.6 via a double slash in the URL.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2020-11-18 15:15:00","updated_at":"2020-12-01 16:05:00"},"problem_types":["CWE-601"],"metrics":[],"references":[{"url":"https://github.com/pallets/werkzeug/pull/890/files","name":"https://github.com/pallets/werkzeug/pull/890/files","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"serving: absolute request URLs need a scheme by untitaker · Pull Request #890 · pallets/werkzeug · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/pallets/flask/issues/1639","name":"https://github.com/pallets/flask/issues/1639","refsource":"MISC","tags":["Exploit","Issue Tracking","Third Party Advisory"],"title":"Dev server redirects to arbitrary url when path starts with double slash // · Issue #1639 · pallets/flask · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/pallets/werkzeug/issues/822","name":"https://github.com/pallets/werkzeug/issues/822","refsource":"MISC","tags":["Issue Tracking","Third Party Advisory"],"title":"dev server sets wrong HTTP_HOST when path starts with a double slash · Issue #822 · pallets/werkzeug · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-28724","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28724","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"28724","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"palletsprojects","cpe5":"werkzeug","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"28724","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"palletsprojects","cpe5":"werkzeug","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-28724","qid":"670971","title":"EulerOS Security Update for python-werkzeug (EulerOS-SA-2021-2612)"},{"cve":"CVE-2020-28724","qid":"671026","title":"EulerOS Security Update for python-werkzeug (EulerOS-SA-2021-2671)"},{"cve":"CVE-2020-28724","qid":"982734","title":"Python (pip) Security Update for werkzeug (GHSA-3p3h-qghp-hvh2)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-28724","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Open redirect vulnerability in werkzeug before 0.11.6 via a double slash in the URL."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://github.com/pallets/flask/issues/1639","refsource":"MISC","name":"https://github.com/pallets/flask/issues/1639"},{"url":"https://github.com/pallets/werkzeug/issues/822","refsource":"MISC","name":"https://github.com/pallets/werkzeug/issues/822"},{"url":"https://github.com/pallets/werkzeug/pull/890/files","refsource":"MISC","name":"https://github.com/pallets/werkzeug/pull/890/files"}]}},"nvd":{"publishedDate":"2020-11-18 15:15:00","lastModifiedDate":"2020-12-01 16:05:00","problem_types":["CWE-601"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":5.8},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*","versionEndExcluding":"0.11.6","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"28724","Ordinal":"191786","Title":"CVE-2020-28724","CVE":"CVE-2020-28724","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"28724","Ordinal":"1","NoteData":"Open redirect vulnerability in werkzeug before 0.11.6 via a double slash in the URL.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"28724","Ordinal":"2","NoteData":"2020-11-18","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"28724","Ordinal":"3","NoteData":"2020-11-18","Type":"Other","Title":"Modified"}]}}}