Security advisory

{
  "id": "adffd165633e947565cc7b3302f2894de21bb733b2c43449879fb2b7b2aeeba4",
  "url": "https://osv.dev/vulnerability/CVE-2020-7245",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-7245",
    "summary": "Incorrect username validation in the registration process of CTFd v2.0.0 - v2.2.2 allows an attacker to take over an arbitrary account if the username is known and emails are enabled on the CTFd instance. To exploit the vulnerability, one must register with a username identical to the victim's username, but with white space inserted before and/or after the username. This will register the account with the same username as the victim. After initiating a password reset for the new account, CTFd will reset the victim's account password due to the username collision.",
    "evidence": "osv:CVE-2020-7245",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-7245",
      "aliases": [
        "CVE-2020-7245"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ctfd/ctfd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "809e4df4719fa63841ff3f28175f9a09da31963a"
                },
                {
                  "last_affected": "fe85fdf1e5561e9f04c1c80c72e894dcd7ea3ad7"
                },
                {
                  "fixed": "d59bfa3578b0e5ac8dd3570038d123014372a81c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "last_affected": "2.2.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d59bfa3578b0e5ac8dd3570038d123014372a81c"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "2.2.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "2.1.5",
            "2.1.4",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.0.6",
            "2.0.5",
            "2.0.4",
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7245.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:30.398324241Z",
      "provider": "osv",
      "references": [
        "https://github.com/CTFd/CTFd/pull/1218",
        "https://github.com/CTFd/CTFd/releases/tag/2.2.3"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-7245",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384375,
  "published_at": "2020-01-23T23:15:11.597+00:00"
}