OPay Payment Gateway for WooCommerce <= 2.5.5 - Unauthenticated Payment Confirmation Forgery via Empty Default Secret Key

{
  "id": "6234033296786c26b7a337f9b6bb706d0c9892e497f0b9ecc3e552829a68df2f",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-103319",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OPay Payment Gateway for WooCommerce <= 2.5.5 - Unauthenticated Payment Confirmation Forgery via Empty Default Secret Key",
    "summary": "The OPay Payment Gateway for WooCommerce WordPress plugin through 2.5.5 does not properly verify that payment notifications originate from the payment provider, as the secret used to validate their signature is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid, cancelled or failed.",
    "evidence": "cve:CVE-2026-103319",
    "products": [
      {
        "name": {
          "value": "OPay Payment Gateway for WooCommerce",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-103319",
      "aliases": [
        "CVE-2026-103319"
      ],
      "metrics": [],
      "affected": [
        {
          "vendor": "Unknown",
          "product": "OPay Payment Gateway for WooCommerce",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "2.5.5"
            }
          ],
          "defaultStatus": "unknown"
        }
      ],
      "modified": "2026-10-26T10:13:35.664Z",
      "provider": "cve",
      "references": [
        "https://wpscan.com/vulnerability/c07f15a0-3c15-429f-bcde-1511ad658c6c/"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "cvssV3_1": {
                  "scope": "UNCHANGED",
                  "version": "3.1",
                  "baseScore": 5.3,
                  "attackVector": "NETWORK",
                  "baseSeverity": "MEDIUM",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
                  "integrityImpact": "LOW",
                  "userInteraction": "NONE",
                  "attackComplexity": "LOW",
                  "availabilityImpact": "NONE",
                  "privilegesRequired": "NONE",
                  "confidentialityImpact": "NONE"
                }
              },
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-103319",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T10:05:36.943697Z"
                  }
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "lang": "en",
                    "type": "CWE",
                    "cweId": "CWE-287",
                    "description": "CWE-287 Improper Authentication"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-26T10:13:35.664Z"
            }
          }
        ],
        "cna": {
          "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
          "shortName": "WPScan",
          "dateUpdated": "2026-10-26T06:00:18.562Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103319",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-cve",
  "document_id": 283267,
  "published_at": "2026-10-26T06:00:18.562+00:00"
}