Security advisory

{
  "id": "b6e2108417162ea52221bbf81fa98d58d8e384be9e5f59f0e4400f92bd55fd84",
  "url": "https://osv.dev/vulnerability/CVE-2019-12250",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-12250",
    "summary": "IdentityServer IdentityServer4 through 2.4 has stored XSS via the httpContext to the host/Extensions/RequestLoggerMiddleware.cs LogForErrorContext method, which can be triggered by viewing a log. NOTE: the software maintainer disputes that this is a vulnerability because the request logger is not part of IdentityServer but only our development test host",
    "evidence": "osv:CVE-2019-12250",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-12250",
      "aliases": [
        "CVE-2019-12250"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/DuendeArchive/IdentityServer4",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "44651bea9b02c992902639b21205f433aad47d03"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:identityserver:identityserver4:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.0",
            "2.4.0-preview1",
            "2.3.2",
            "2.3.0",
            "nuget_2.3.0-preview2",
            "2.3.0-preview1-update2",
            "2.3.0-preview1-update1",
            "2.3.0-preview1",
            "2.2.0",
            "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",
            "2.0.0-rc1-update1",
            "2.0.0-rc1",
            "1.5.0",
            "1.4.2",
            "1.4.1",
            "1.3.1",
            "1.3.0",
            "1.2.1",
            "1.2.0",
            "1.2",
            "1.1.1",
            "1.1.0",
            "1.0.2",
            "1.0.1",
            "1.0.0-rc4",
            "1.0.0-rc3",
            "1.0.0-rc2",
            "1.0.0-rc1-update2",
            "1.0.0-rc1-update1",
            "1.0.0-rc1",
            "beta5",
            "beta4-update2",
            "beta4-update1",
            "beta4",
            "beta3",
            "beta2-update2",
            "beta2",
            "beta1-update1",
            "1.0.0-beta1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12250.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:36.158048393Z",
      "provider": "osv",
      "references": [
        "https://github.com/IdentityServer/IdentityServer4/issues/3279"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-12250",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382629,
  "published_at": "2019-05-21T16:29:01.877+00:00"
}