Security advisory

{
  "id": "95569cfc586d9b96f03a30634e9c65c035afa2e52c619fafe6fb82801739d59f",
  "url": "https://osv.dev/vulnerability/CVE-2021-33199",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33199",
    "summary": "In Expression Engine before 6.0.3, addonIcon in Addons/file/mod.file.php relies on the untrusted input value of input->get('file') instead of the fixed file names of icon.png and icon.svg.",
    "evidence": "osv:CVE-2021-33199",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-33199",
      "aliases": [
        "CVE-2021-33199"
      ],
      "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/expressionengine/expressionengine",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c07f240e92b0a2e05d0b3dcafcf5898421140491"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:expressionengine:expressionengine:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "6.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c07f240e92b0a2e05d0b3dcafcf5898421140491"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "6.0.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.0.2",
            "6.0.1",
            "6.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33199.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:43.398176669Z",
      "provider": "osv",
      "references": [
        "https://github.com/ExpressionEngine/ExpressionEngine/releases/tag/6.0.3",
        "https://github.com/ExpressionEngine/ExpressionEngine/compare/6.0.1...6.0.3#diff-17bcb23e5666fc2dccb79c7133e9eeb701847f67ae84fbde0a673c3fd3d109e0R508"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-33199",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386000,
  "published_at": "2021-08-12T21:15:07.5+00:00"
}