{"answers":{"affected":"3 open source packages ship an affected version, including flask-appbuilder and Flask-AppBuilder. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-41265 in the wild and no public exploit code.","fix":"Upgrade flask-appbuilder to 3.3.4 or later.","what":"CVE-2021-41265 is a high-severity authentication bypass vulnerability in dpgaspar Flask-AppBuilder, published on 9 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-41265 and fix it if it is affected.\n\nWhat it is: CVE-2021-41265 is a high-severity authentication bypass vulnerability in dpgaspar Flask-AppBuilder, published on 9 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-41265 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- flask-appbuilder (PyPI): affected all versions; fixed in 3.3.4\n- flask-appbuilder (PyPI): affected all versions; fixed in 3.3.4\n- Flask-AppBuilder (PyPI): affected all versions; fixed in 3.3.4\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-41265/ (Markdown: https://insights.sbomify.com/CVE-2021-41265/index.md)","id":"CVE-2021-41265","markdown":"https://insights.sbomify.com/CVE-2021-41265/index.md","name":"CVE-2021-41265","record":{"aliases":["GHSA-m3rf-7m4w-r66q","PYSEC-2021-851"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Flask development framework","requires_auth":"low_privilege","summary":"Attackers can bypass authentication to access protected REST API endpoints in Flask-AppBuilder when using non-database authentication types.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"flask-appbuilder","vendor":"dpgaspar"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"Flask-AppBuilder is a development framework built on top of Flask. Verions prior to 3.3.4 contain an improper authentication vulnerability in the REST API. The issue allows for a malicious actor with a carefully crafted request to successfully authenticate and gain access to existing protected REST API endpoints. This only affects non database authentication types and new REST API endpoints. Users should upgrade to Flask-AppBuilder 3.3.4 to receive a patch.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Improper Authentication in Flask-AppBuilder","id":"CVE-2021-41265","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":3,"n_references":3,"next":{"headline":"Authentication bypass issue in the Operator Console","id":"CVE-2021-41266"},"packages":[{"ecosystem":"PyPI","fixed":["3.3.4"],"introduced":["0"],"last_affected":[],"package":"Flask-AppBuilder","purl":null,"source":"GHSA-m3rf-7m4w-r66q"},{"ecosystem":"PyPI","fixed":["3.3.4"],"introduced":["0"],"last_affected":[],"package":"flask-appbuilder","purl":"pkg:pypi/flask-appbuilder","source":"GHSA-m3rf-7m4w-r66q"},{"ecosystem":"PyPI","fixed":["3.3.4"],"introduced":["0"],"last_affected":[],"package":"flask-appbuilder","purl":"pkg:pypi/flask-appbuilder","source":"PYSEC-2021-851"}],"prev":{"headline":"UUPSUpgradeable vulnerability in OpenZeppelin Contracts","id":"CVE-2021-41264"},"products":["Flask-AppBuilder"],"published":"2021-12-09","related":[{"cvss_score":9.1,"headline":"Flask-AppBuilder incorrect authentication when using auth type OpenID","id":"CVE-2024-25128","kev_date_added":null,"published":"2024-02-28"},{"cvss_score":7.5,"headline":"No Rate Limiting on Login AUTH DB","id":"CVE-2023-29005","kev_date_added":null,"published":"2023-04-10"},{"cvss_score":7.2,"headline":"URL Redirection to Untrusted Site ('Open Redirect') in Flask-AppBuilder","id":"CVE-2021-32805","kev_date_added":null,"published":"2021-09-08"},{"cvss_score":6.5,"headline":"Flask App Builder has an Authentication Bypass vulnerability when using non AUTH_DB methods","id":"CVE-2025-58065","kev_date_added":null,"published":"2025-09-11"},{"cvss_score":6.1,"headline":"Open Redirect in Flask-AppBuilder","id":"CVE-2022-24776","kev_date_added":null,"published":"2022-03-24"},{"cvss_score":5.3,"headline":"Observable Response Discrepancy in Flask-AppBuilder","id":"CVE-2022-21659","kev_date_added":null,"published":"2022-01-31"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["dpgaspar"]},"summary":"Attackers can bypass authentication to access protected REST API endpoints in Flask-AppBuilder when using non-database authentication types.","url":"https://insights.sbomify.com/CVE-2021-41265/"}