Observable Response Discrepancy in Flask-AppBuilder

{
  "id": "caef6c3e6322f7e94972bc17447aaac5992e7db2195b689cd5f6b9bf7e88e945",
  "url": "https://osv.dev/vulnerability/CVE-2022-21659",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Observable Response Discrepancy in Flask-AppBuilder",
    "summary": "Flask-AppBuilder is an application development framework, built on top of the Flask web framework. In affected versions there exists a user enumeration vulnerability. This vulnerability allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Users are advised to upgrade to version 3.4.4 as soon as possible. There are no known workarounds for this issue.",
    "evidence": "osv:CVE-2022-21659",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2022-21659",
      "aliases": [
        "CVE-2022-21659",
        "GHSA-wfjw-w6pv-8p7f",
        "PYSEC-2022-24"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dpgaspar/flask-appbuilder",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fc93179095208c26d545911a52641cfefc2ff126"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.4.1",
            "v3.4.0",
            "v3.3.4",
            "v3.3.3",
            "v3.3.2",
            "v3.3.1",
            "v3.3.0",
            "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-2022-21659.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.846856743Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21659.json",
        "https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-wfjw-w6pv-8p7f",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-21659",
        "https://github.com/dpgaspar/Flask-AppBuilder/pull/1775"
      ],
      "provider_metadata": {
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21659.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-21659",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490373,
  "published_at": "2022-01-31T20:20:40+00:00"
}