Security advisory

{
  "id": "43afcc44819b2922d4a33c964b0dbfcc6538e992ad6f25016e651a5019b29783",
  "url": "https://osv.dev/vulnerability/CVE-2021-3754",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3754",
    "summary": "A flaw was found in keycloak where an attacker is able to register himself with the username same as the email ID of any existing user. This may cause trouble in getting password recovery email in case the user forgets the password.",
    "evidence": "osv:CVE-2021-3754",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3754",
      "aliases": [
        "CVE-2021-3754",
        "GHSA-4vc8-pg5c-vg4x"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/keycloak/keycloak",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e6a274ea0e31c6572e795f3372f006c88122539b"
                },
                {
                  "last_affected": "e6a274ea0e31c6572e795f3372f006c88122539b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.0"
                      },
                      {
                        "last_affected": "7.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.0",
            "7.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3754.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:28.976438927Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/security/cve/CVE-2021-3754",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1999196"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-3754",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432182,
  "published_at": "2022-08-26T16:15:09.52+00:00"
}