{"cve":"CVE-2020-28724","nvd":{"published":"2020-11-18T15:15:12.990","modified":"2026-06-17T03:10:43.420","status":"Modified","description":"Open redirect vulnerability in werkzeug before 0.11.6 via a double slash in the URL.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-601"],"references":["https://github.com/pallets/flask/issues/1639","https://github.com/pallets/werkzeug/issues/822","https://github.com/pallets/werkzeug/pull/890/files","https://github.com/pallets/flask/issues/1639","https://github.com/pallets/werkzeug/issues/822"],"products":["palletsprojects:werkzeug"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-28724","score":0.01681,"percentile":0.76954,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-3p3h-qghp-hvh2","url":"https://osv.dev/vulnerability/GHSA-3p3h-qghp-hvh2","summary":"Open Redirect in werkzeug","modified":"2024-11-19T18:25:03.456250Z","packages":[{"ecosystem":"PyPI","name":"werkzeug","purl":"pkg:pypi/werkzeug","ranges":["<0.11.6"],"fixed":["0.11.6"]}]},{"id":"PYSEC-2020-157","url":"https://osv.dev/vulnerability/PYSEC-2020-157","summary":"","modified":"2023-11-08T04:03:29.158614Z","packages":[{"ecosystem":"PyPI","name":"werkzeug","purl":"pkg:pypi/werkzeug","ranges":["<0.11.6"],"fixed":["0.11.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}