Security advisory

{
  "id": "e1ef85bb26fa1aad3cbde770931e4242e3189bdb17a1458faa1038aa370398d9",
  "url": "https://osv.dev/vulnerability/CVE-2021-36548",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-36548",
    "summary": "A remote code execution (RCE) vulnerability in the component /admin/index.php?id=themes&action=edit_template&filename=blog of Monstra v3.0.4 allows attackers to execute arbitrary commands via a crafted PHP file.",
    "evidence": "osv:CVE-2021-36548",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-36548",
      "aliases": [
        "CVE-2021-36548"
      ],
      "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/monstra-cms/monstra",
              "type": "GIT",
              "events": [
                {
                  "introduced": "81bad8b6649253bd972ac4158816189d38366216"
                },
                {
                  "last_affected": "81bad8b6649253bd972ac4158816189d38366216"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:monstra:monstra:3.0.4:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.0.4"
                      },
                      {
                        "last_affected": "3.0.4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.4",
            "v3.0.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36548.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:50.523875289Z",
      "provider": "osv",
      "references": [
        "https://github.com/monstra-cms/monstra/issues/470"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-36548",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384678,
  "published_at": "2021-10-28T20:15:07.533+00:00"
}