{"cve":"CVE-2021-32805","nvd":{"published":"2021-09-08T18:15:14.733","modified":"2026-06-17T03:53:39.913","status":"Modified","description":"Flask-AppBuilder is an application development framework, built on top of Flask. In affected versions if 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. To resolve this issue upgrade to Flask-AppBuilder 3.2.2 or above. If upgrading is infeasible users may filter HTTP traffic containing `?next={next-site}` where the `next-site` domain is different from the application you are protecting as a workaround.","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/dpgaspar/Flask-AppBuilder/commit/6af28521589599b1dbafd6313256229ee9a4fa74","https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-624f-cqvr-3qw4","https://github.com/dpgaspar/Flask-AppBuilder/commit/6af28521589599b1dbafd6313256229ee9a4fa74","https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-624f-cqvr-3qw4"],"products":["dpgaspar:flask-appbuilder"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-32805","score":0.007,"percentile":0.53207,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-624f-cqvr-3qw4","url":"https://osv.dev/vulnerability/GHSA-624f-cqvr-3qw4","summary":"Flask-AppBuilder Open Redirect vulnerability","modified":"2026-07-08T06:28:28.582001410Z","packages":[{"ecosystem":"PyPI","name":"flask-appbuilder","purl":"pkg:pypi/flask-appbuilder","ranges":["<3.3.2"],"fixed":["3.3.2"]}]},{"id":"PYSEC-2021-359","url":"https://osv.dev/vulnerability/PYSEC-2021-359","summary":"","modified":"2023-11-08T04:06:00.588656Z","packages":[{"ecosystem":"PyPI","name":"flask-appbuilder","purl":"pkg:pypi/flask-appbuilder","ranges":["<3.3.2"],"fixed":["3.3.2"]}]}],"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."]}