Security advisory

{
  "id": "bdcbbaece7bd9dc43d257c71ef9085209a4cc7170d0311995149ade78e4f8490",
  "url": "https://osv.dev/vulnerability/CVE-2020-8818",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8818",
    "summary": "An issue was discovered in the CardGate Payments plugin through 2.0.30 for Magento 2. Lack of origin authentication in the IPN callback processing function in Controller/Payment/Callback.php allows an attacker to remotely replace critical plugin settings (merchant ID, secret key, etc.) and therefore bypass the payment process (e.g., spoof an order status by manually sending an IPN callback request with a valid signature but without real payment) and/or receive all of the subsequent payments.",
    "evidence": "osv:CVE-2020-8818",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-8818",
      "aliases": [
        "CVE-2020-8818",
        "GHSA-qf6q-qfwp-vp44"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cardgate/magento2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "aa763531d4172ecaed67958582d19cca5cef684d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cardgate:cardgate_payments:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.0.30"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.30",
            "v2.0.29",
            "v2.0.28",
            "v2.0.27",
            "v2.0.26",
            "v2.0.25",
            "v2.0.24",
            "v2.0.23",
            "v2.0.22",
            "v2.0.21",
            "v2.0.20",
            "v2.0.19",
            "v2.0.18",
            "v2.0.17",
            "v2.0.16",
            "v2.0.9",
            "v2.0.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8818.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/magento/magento2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5f3b86ab4bd3e3b94e65429fed33f748d29c1bbe"
                },
                {
                  "last_affected": "5f3b86ab4bd3e3b94e65429fed33f748d29c1bbe"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:adobe:magento:2.3.4:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.3.4"
                      },
                      {
                        "last_affected": "2.3.4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.3.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8818.json"
          }
        }
      ],
      "modified": "2026-10-24T10:50:23.753148220Z",
      "provider": "osv",
      "references": [
        "https://github.com/cardgate/magento2/blob/715979e54e1a335d78a8c5586f9e9987c3bf94fd/Controller/Payment/Callback.php#L88-L107",
        "https://github.com/cardgate/magento2/issues/54"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:cardgate:cardgate_payments:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "cardgate:cardgate_payments",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2.0.30"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-8818",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 442099,
  "published_at": "2020-02-25T02:15:12.097+00:00"
}