Security advisory

{
  "id": "1a03ff4edfa3a03b55a688e3d4b9f3cc870f5d79e13df1297033d81d8f345940",
  "url": "https://osv.dev/vulnerability/CVE-2019-20174",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-20174",
    "summary": "Auth0 Lock before 11.21.0 allows XSS when additionalSignUpFields is used with an untrusted placeholder.",
    "evidence": "osv:CVE-2019-20174",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-20174",
      "aliases": [
        "CVE-2019-20174",
        "GHSA-w2pf-g6r8-pg22"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/auth0/lock",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ec6fdab293c972f0159c6d333f67df949ea1350d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:auth0:lock:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "11.21.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ec6fdab293c972f0159c6d333f67df949ea1350d"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v11.21.0"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-20174.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:36.370788501Z",
      "provider": "osv",
      "references": [
        "https://github.com/auth0/lock/releases/tag/v11.21.0",
        "https://auth0.com/docs/security/bulletins/cve-2019-20174"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-20174",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383701,
  "published_at": "2020-02-03T18:15:12.053+00:00"
}