{"action":"Upgrade flask-security to 5.5.1 or later.","affected":[{"fixed":"5.5.1","introduced":"0"}],"component":"flask-security","cve_ids":["CVE-2021-23385"],"ecosystem":"PyPI","epss":0.01247,"exploited":false,"fixed_versions":["5.5.1"],"ghsa_id":"GHSA-cg8c-gc2j-2wf7","id":"tcs_01M5KHDPAX1EVN82W34N241W71","modified_at":"2026-07-07T11:45:45.877626931Z","published_at":"2026-07-07T10:17:22.496909Z","references":["https://osv.dev/vulnerability/PYSEC-2026-809","https://nvd.nist.gov/vuln/detail/CVE-2021-23385","https://github.com/mattupstate/flask-security","https://security.snyk.io/vuln/SNYK-PYTHON-FLASKSECURITY-1293234","https://snyk.io/blog/url-confusion-vulnerabilities","https://pypi.org/project/flask-security","https://github.com/advisories/GHSA-cg8c-gc2j-2wf7"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"PYSEC-2026-809","url":"https://osv.dev/vulnerability/PYSEC-2026-809"}],"summary":"Flask-Security vulnerable to Open Redirect"}