{"id":"CVE-2021-29621","details":"Flask-AppBuilder is a development framework, built on top of Flask. User enumeration in database authentication in Flask-AppBuilder \u003c= 3.2.3. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Upgrade to version 3.3.0 or higher to resolve.","aliases":["BIT-airflow-2021-29621","GHSA-434h-p4gx-jm89","PYSEC-2021-90"],"modified":"2026-08-07T16:50:27.521335Z","published":"2021-06-07T19:15:07.600Z","references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5b754118ba4e996adf03863705d34168bffec202da5c6bdc9bf3add5%40%3Cannounce.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r91067f953906d93aaa1c69fe2b5472754019cc6bd4f1ba81349d62a0%40%3Ccommits.airflow.apache.org%3E"},{"type":"ADVISORY","url":"https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-434h-p4gx-jm89"},{"type":"FIX","url":"https://github.com/dpgaspar/Flask-AppBuilder/commit/780bd0e8fbf2d36ada52edb769477e0a4edae580"},{"type":"PACKAGE","url":"https://pypi.org/project/Flask-AppBuilder/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/airflow","events":[{"introduced":"b0057c29de1676435501f7af49143a8d008c7daa"},{"last_affected":"b0057c29de1676435501f7af49143a8d008c7daa"}],"database_specific":{"cpe":"cpe:2.3:a:apache:airflow:1.10.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.10.0"},{"last_affected":"1.10.0"}],"source":"CPE_STRING"}}],"versions":["1.10.0","providers/2025-12-01","providers-standard/1.10.0rc2","providers-standard/1.10.0","providers-ssh/4.2.0rc2","providers-ssh/4.2.0","providers-slack/9.6.0rc2","providers-slack/9.6.0","providers-microsoft-azure/12.9.0rc2","providers-microsoft-azure/12.9.0","providers-google/19.1.0rc2","providers-google/19.1.0","providers-edge3/1.6.0rc2","providers-edge3/1.6.0","providers-docker/4.5.0rc2","providers-docker/4.5.0","providers-common-sql/1.30.0rc2","providers-common-sql/1.30.0","providers-cncf-kubernetes/10.11.0rc2","providers-cncf-kubernetes/10.11.0","providers-celery/3.14.0rc2","providers-celery/3.14.0","providers-amazon/9.18.0rc2","providers-amazon/9.18.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29621.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/dpgaspar/flask-appbuilder","events":[{"introduced":"0"},{"last_affected":"0525e549ef7170f5623af4244f61991ad19bc215"},{"fixed":"780bd0e8fbf2d36ada52edb769477e0a4edae580"}],"database_specific":{"cpe":"cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"3.2.3"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v3.2.3","v3.2.2","v3.2.1","v3.2.0","3.1.1","v3.1.1","v3.1.0","v3.0.1","v3.0.0","v2.3.4","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.3","v2.2.2","v2.2.1","v2.2.1rc1","v2.2.0","v2.1.13","v2.1.12","v2.1.11","v2.1.10","v2.1.9","v2.1.8","v2.1.7","v2.1.6","v2.1.5","v2.1.4","v1.13.0","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.0","v1.12.5","v1.12.4","v1.12.3","v1.12.2","v1.12.1","v1.9.6","v1.12.0","v1.11.1","v1.11.0","v1.10.0","v1.9.5","v1.9.4","v1.9.3","v1.9.2","v1.9.1","v1.9.0","v1.8.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29621.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}