Security advisory

{
  "id": "c1e26ae7e9462cd5fb275de3d8ecc34083d5a6dc9173af4fe29c12b44a9132c8",
  "url": "https://osv.dev/vulnerability/CVE-2021-28290",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-28290",
    "summary": "A cross-site scripting (XSS) vulnerability in Skoruba IdentityServer4.Admin before 2.0.0 via unencoded value passed to the data-secret-value parameter.",
    "evidence": "osv:CVE-2021-28290",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-28290",
      "aliases": [
        "CVE-2021-28290"
      ],
      "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/skoruba/identityserver4.admin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b92609aea5a2bcdbea4a34eda75cb3b13d5f6887"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:identityserver4.admin_project:identityserver4.admin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.0-preview-beta1",
            "1.0.0",
            "1.0.0-rc4",
            "1.0.0-rc3",
            "1.0.0-rc2",
            "1.0.0-rc1",
            "1.0.0-beta7",
            "1.0.0-beta6",
            "1.0.0-beta5",
            "1.0.0-beta4",
            "1.0.0-beta3",
            "1.0.0-beta2",
            "1.0.0-beta1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28290.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:36.374130134Z",
      "provider": "osv",
      "references": [
        "https://github.com/skoruba/IdentityServer4.Admin/issues/813"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-28290",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385711,
  "published_at": "2022-05-11T18:15:22.16+00:00"
}