Security advisory

{
  "id": "9bc2aec7cdb6dcc583db109e9782c0bf715250e3dbb2c7bc0988566dd6b2ba8c",
  "url": "https://osv.dev/vulnerability/CVE-2021-41749",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41749",
    "summary": "In the SEOmatic plugin up to 3.4.11 for Craft CMS 3, it is possible for unauthenticated attackers to perform a Server-Side Template Injection, allowing for remote code execution.",
    "evidence": "osv:CVE-2021-41749",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-41749",
      "aliases": [
        "CVE-2021-41749",
        "GHSA-g7xr-v82w-qggq"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nystudio107/craft-seomatic",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "e59c9dde903d21eb2451017f278ef82d9d3534d3"
                },
                {
                  "fixed": "3fee7d50147cdf3f999cfc1e04cbc3fb3d9f2f7d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nystudio107:seomatic:*:*:*:*:*:craft_cms:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.4.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3fee7d50147cdf3f999cfc1e04cbc3fb3d9f2f7d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.4.11",
            "3.4.10",
            "3.4.9",
            "3.4.8",
            "3.4.7",
            "3.4.6",
            "3.4.5",
            "3.4.4",
            "3.4.3",
            "3.4.2",
            "3.4.1",
            "3.4.0",
            "3.3.48",
            "3.0.23",
            "3.0.0-beta.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41749.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:58.813776062Z",
      "provider": "osv",
      "references": [
        "https://github.com/nystudio107/craft-seomatic/blob/develop/CHANGELOG.md",
        "https://github.com/nystudio107/craft-seomatic/commit/3fee7d50147cdf3f999cfc1e04cbc3fb3d9f2f7d"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-41749",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386616,
  "published_at": "2022-06-12T11:15:07.663+00:00"
}