{"cve":"CVE-2023-49438","nvd":{"published":"2023-12-26T22:15:13.973","modified":"2026-06-17T06:35:59.800","status":"Modified","description":"An open redirect vulnerability in the python package Flask-Security-Too <=5.3.2 allows attackers to redirect unsuspecting users to malicious sites via a crafted URL by abusing the ?next parameter on the /login and /register routes.","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/Flask-Middleware/flask-security","https://github.com/brandon-t-elliott/CVE-2023-49438","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HCYH377TPUMUHELPI36PDS2ZM4VFIXM/","https://github.com/Flask-Middleware/flask-security","https://github.com/brandon-t-elliott/CVE-2023-49438"],"products":["flask-security-too_project:flask-security-too"],"source":"nvd","synced_at":"2026-10-19T21:43:38.875533635+00:00"},"epss":{"cve":"CVE-2023-49438","score":0.01079,"percentile":0.65082,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-672h-6x89-76m5","url":"https://osv.dev/vulnerability/GHSA-672h-6x89-76m5","summary":"Open redirect vulnerability in Flask-Security-Too","modified":"2024-09-20T18:01:48.769927Z","packages":[{"ecosystem":"PyPI","name":"flask-security-too","purl":"pkg:pypi/flask-security-too","ranges":["<5.3.3"],"fixed":["5.3.3"]}]},{"id":"PYSEC-2023-248","url":"https://osv.dev/vulnerability/PYSEC-2023-248","summary":"","modified":"2026-06-10T17:01:17.257583819Z","packages":[{"ecosystem":"PyPI","name":"flask-security-too","purl":"pkg:pypi/flask-security-too","ranges":["<5.3.3"],"fixed":["5.3.3"]}]}],"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."]}