{"id":"CVE-2025-24023","aliases":["EUVD-2025-5564","GHSA-p8q5-cvwx-wvwp","PYSEC-2025-15"],"status":"published","title":"Observable Response Discrepancy in flask-appbuilder","description":"Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. 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Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24023","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2025-15.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-p8q5-cvwx-wvwp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/24xxx/CVE-2025-24023.json","tags":["advisory"]},{"url":"https://github.com/dpgaspar/Flask-AppBuilder","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-24023","title":"Observable Response Discrepancy in flask-appbuilder","description":"Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.","status":"published","published":"2025-03-03T15:25:55.437Z","modified":"2025-03-03T18:41:23.427Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T14:32:43.770144Z"}],"euvd":[{"id":"EUVD-2025-5564","description":"Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.","status":"published","published":"2025-03-03T15:25:55Z","modified":"2025-03-03T18:41:23Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T20:53:18.061162Z"}],"ghsa":[{"id":"GHSA-p8q5-cvwx-wvwp","title":"Flask-AppBuilder Observable Response Discrepancy","description":"### Impact\nUser enumeration in database authentication in Flask-AppBuilder \u003c= 4.5.3 and werkzeug \u003e= 3.0.0. Allows for a non authenticated user to enumerate existing usernames by timing the response time from the server when brute forcing requests to login.\n\n### Patches\n\nUpgrade to flask-appbuilder\u003e=4.5.3\n\n### Workarounds\nDowngrade werkzeug to \u003c3.0.0\n\n### References\n_Are there any links users can visit to find out more?_","status":"published","published":"2025-03-03T15:26:03Z","modified":"2025-04-09T20:01:42Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T14:38:38.344711Z"}],"nvd":[{"id":"CVE-2025-24023","description":"Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.","status":"published","published":"2025-03-03T16:15:41.82Z","modified":"2026-06-17T08:57:54.45Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-204","CWE-203"],"updated_at":"2026-11-02T14:10:52.398004Z"}],"osv":[{"id":"CVE-2025-24023","title":"Observable Response Discrepancy in flask-appbuilder","description":"Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.","status":"published","published":"2025-03-03T15:25:55.437Z","modified":"2026-10-28T02:30:55.36664357Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T15:44:47.009967Z"},{"id":"GHSA-p8q5-cvwx-wvwp","title":"Flask-AppBuilder Observable Response Discrepancy","description":"### Impact\nUser enumeration in database authentication in Flask-AppBuilder \u003c= 4.5.3 and werkzeug \u003e= 3.0.0. Allows for a non authenticated user to enumerate existing usernames by timing the response time from the server when brute forcing requests to login.\n\n### Patches\n\nUpgrade to flask-appbuilder\u003e=4.5.3\n\n### Workarounds\nDowngrade werkzeug to \u003c3.0.0\n\n### References\n_Are there any links users can visit to find out more?_","status":"published","published":"2025-03-03T15:26:03Z","modified":"2026-09-10T03:49:48.433021837Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T15:46:52.891208Z"},{"id":"PYSEC-2025-15","description":"Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.","status":"published","published":"2025-03-03T16:15:41Z","modified":"2025-04-09T17:59:13.715799Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:54.242332Z"}]}}