{"id":"CVE-2021-32805","aliases":["GHSA-624f-cqvr-3qw4","PYSEC-2021-359"],"title":"Flask-AppBuilder Open Redirect vulnerability","summary":"Flask-AppBuilder Open Redirect vulnerability","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","vendor":"flask-appbuilder","product":"flask-appbuilder","ecosystem":"pip","affected":["flask-appbuilder < 3.3.2"],"patched":["flask-appbuilder 3.3.2"],"published":"2021-09-08","updated":"2026-07-08","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-624f-cqvr-3qw4","references":[{"url":"https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-624f-cqvr-3qw4"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32805"},{"url":"https://github.com/dpgaspar/Flask-AppBuilder/commit/6af28521589599b1dbafd6313256229ee9a4fa74"},{"url":"https://github.com/dpgaspar/Flask-AppBuilder"},{"url":"https://github.com/dpgaspar/Flask-AppBuilder/releases/tag/v3.3.2"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2021-359.yaml"},{"url":"https://pypi.org/project/Flask-AppBuilder"}],"tags":["osv","pip"],"epss":0.007,"epssPercentile":0.51784,"ingestedAt":"2026-07-08T18:25:46.257Z","slug":"CVE-2021-32805","body":"## Overview\n\n### Impact\nIf using Flask-AppBuilder OAuth, an attacker can share a carefully crafted URL with a trusted domain for an application built with Flask-AppBuilder, this URL can redirect a user to a malicious site. This is an open redirect vulnerability \n\n### Patches\nInstall Flask-AppBuilder 3.2.2 or above\n\n### Workarounds\nFilter HTTP traffic containing `?next={next-site}` where the `next-site` domain is different from the application you are protecting\n\n## Affected packages\n\n- `flask-appbuilder < 3.3.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `flask-appbuilder 3.3.2`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}