Security advisory

{
  "id": "ea8b205ff1b5c48f3c0153660e906061cfa055c430897ec240260549038324a6",
  "url": "https://osv.dev/vulnerability/CVE-2018-18307",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-18307",
    "summary": "A Stored XSS vulnerability has been discovered in version 4.1.0 of AlchemyCMS via the /admin/pictures image field. NOTE: the vendor's position is that this is not a valid report: \"The researcher used an authorized cookie to perform the request to a password-protected route. Without that session cookie, the request would have been rejected as unauthorized.\"",
    "evidence": "osv:CVE-2018-18307",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-18307",
      "aliases": [
        "CVE-2018-18307"
      ],
      "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/alchemycms/alchemy_cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "de6e53192bc846016e6f16adaa92f9e0406751ab"
                },
                {
                  "last_affected": "de6e53192bc846016e6f16adaa92f9e0406751ab"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:alchemy-cms:alchemy_cms:4.1.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.1.0"
                      },
                      {
                        "last_affected": "4.1.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.1.0",
            "v4.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-18307.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:10.751022174Z",
      "provider": "osv",
      "references": [
        "https://github.com/AlchemyCMS/alchemy_cms/blob/4.1-stable/app/controllers/alchemy/admin/base_controller.rb#L15",
        "https://github.com/AlchemyCMS/alchemy_cms/blob/4.1-stable/app/controllers/alchemy/admin/pictures_controller.rb#L5",
        "https://github.com/AlchemyCMS/alchemy_cms/blob/4.1-stable/app/controllers/alchemy/admin/resources_controller.rb#L21",
        "https://www.exploit-db.com/exploits/45601"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-18307",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381383,
  "published_at": "2018-10-16T22:29:01.697+00:00"
}