Security advisory

{
  "id": "b23ac3f482162afd4ffacb0004fab47ccb6a811eabbbfa1e05dbf11e32a37b56",
  "url": "https://osv.dev/vulnerability/CVE-2021-34254",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-34254",
    "summary": "Umbraco CMS before 7.15.7 is vulnerable to Open Redirection due to insufficient url sanitization on booting.aspx.",
    "evidence": "osv:CVE-2021-34254",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-34254",
      "aliases": [
        "CVE-2021-34254"
      ],
      "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/umbraco/umbraco-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7447cc4b7eb2c66f2ba4ecba02d0dbdfbbab2d4f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.15.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "release-7.15.6",
            "release-7.15.5",
            "release-7.15.3",
            "release-7.4.3",
            "release-7.5.14",
            "release-7.7.13",
            "release-7.14.0",
            "release/7.15.2",
            "release-7.15.2",
            "release-7.15.1",
            "release-7.15.0",
            "release-7.10.0",
            "release-7.13.0",
            "release-7.12.1",
            "release-7.12.0",
            "release-7.11.0",
            "release-7.6.7",
            "release-7.9.3",
            "release-7.9.2",
            "release-7.9.1",
            "release-7.7.12",
            "release-7.7.11",
            "release-7.7.10",
            "release-7.7.9",
            "release-7.7.8",
            "release-7.7.6",
            "release-7.7.7",
            "release-7.7.5",
            "release-7.7.4",
            "release-7.6.3",
            "release-7.7.2",
            "release-7.6.8",
            "release-7.6.2",
            "release-7.5.13",
            "release-7.5.12",
            "release-7.5.11",
            "release-7.5.10",
            "release-7.5.9",
            "release-7.5.8",
            "release-7.5.3",
            "release-7.5.5",
            "release-7.5.1",
            "release-7.5.0",
            "release-7.5.0-beta2",
            "release-7.5.0-beta",
            "release-7.4.2",
            "release-7.4.1",
            "release-7.4.0-beta2",
            "release-7.4.0",
            "release-7.4.0-RC1",
            "release-7.2.0-beta2",
            "release-7.2.0-beta",
            "release-7.1.4",
            "release-7.2.0-alpha",
            "release-7.1.3",
            "release-7.1.2",
            "release-7.1.1",
            "release-7.1.0",
            "release-7.1.0-RC",
            "release-7.0.0",
            "release-7.0.0-RC",
            "release-7.0.0-beta",
            "release-6.1.0-beta",
            "4.7.2",
            "Release-4.6.0",
            "Sprint-Juno-A",
            "Release-4.5.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-34254.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:45.004192845Z",
      "provider": "osv",
      "references": [
        "https://github.com/umbraco/Umbraco-CMS/issues/9782"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-34254",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386073,
  "published_at": "2021-06-28T16:15:08.743+00:00"
}