Security advisory

{
  "id": "aa4bc15a3d8115ce02cc1b5a810bafdd0b85e554b492c81966553b2aab45c946",
  "url": "https://osv.dev/vulnerability/CVE-2020-13485",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-13485",
    "summary": "The Knock Knock plugin before 1.2.8 for Craft CMS allows IP Whitelist bypass via an X-Forwarded-For HTTP header.",
    "evidence": "osv:CVE-2020-13485",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-13485",
      "aliases": [
        "CVE-2020-13485",
        "GHSA-wxvr-qqm7-6h65"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/verbb/knock-knock",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "706a538655425cf27bcb2b0f677bb568cc069dff"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:verbb:knock_knock:*:*:*:*:*:craft_cms:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.2.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.1.2",
            "1.2.7",
            "1.2.6",
            "1.2.5",
            "1.2.4.2",
            "1.2.4.1",
            "1.2.4",
            "1.2.3",
            "1.2.2",
            "1.2.1",
            "1.2.0",
            "1.1.1",
            "1.1.0",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13485.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:36.395540407Z",
      "provider": "osv",
      "references": [
        "https://github.com/verbb/knock-knock/blob/craft-3/CHANGELOG.md",
        "https://limpidsecurity.pl/security-advisories/1/knock-knock-plugin-for-craft-cms/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-13485",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382633,
  "published_at": "2020-05-25T23:15:09.643+00:00"
}