Security advisory

{
  "id": "5f672ee791b3d11a53ce804d862d4e1f878a2b4992f7620b937bd76fc9b37c4e",
  "url": "https://osv.dev/vulnerability/CVE-2021-42650",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-42650",
    "summary": "Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.",
    "evidence": "osv:CVE-2021-42650",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-42650",
      "aliases": [
        "CVE-2021-42650"
      ],
      "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/portainer/portainer",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "273ef6c2edc41dcd6eb359bd81856063dd908f53"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:portainer:portainer:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.9.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.9.0",
            "2.6.3",
            "2.6.2",
            "2.6.1",
            "2.6.0",
            "2.5.1",
            "2.5.0",
            "2.1.1",
            "2.1.0",
            "2.0.1",
            "2.0.0",
            "1.20.0",
            "1.11.3",
            "internal-1.6.0",
            "internal-1.5.0",
            "internal-1.4.0",
            "internal-1.3.0",
            "internal-1.2.0",
            "v0.6.0",
            "v0.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42650.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:05.308217901Z",
      "provider": "osv",
      "references": [
        "https://github.com/purple-WL/Security-vulnerability/blob/main/Portainer%20Custom%20Templates%20xss",
        "https://github.com/portainer/portainer/pull/5766"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-42650",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384848,
  "published_at": "2021-10-18T21:15:08.77+00:00"
}