{"identifier":"CVE-2026-103311","cve":{"id":"CVE-2026-103311","description":"The Coinbase Commerce Payment Gateway for WooCommerce WordPress plugin through 1.4.1 does not verify the authenticity of incoming payment webhook notifications, because the shared secret used to validate the request signature is empty by default and nothing rejects an unconfigured secret, allowing unauthenticated attackers to forge notifications that mark arbitrary orders as paid or cancel already-paid orders.","published":"2026-10-19T07:16:30.260000+00:00","modified":"2026-10-19T21:04:50.950000+00:00","status":"Deferred","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cvss_version":"3.1","affected":[],"weaknesses":["CWE-345"],"references":[{"url":"https://wpscan.com/vulnerability/3d43ae6a-ca0d-49f9-aa3a-a584e5155efe/","source":"contact@wpscan.com"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"contact@wpscan.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-19T09:26:37.623098Z","id":"CVE-2026-103311","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T10:23:37.596987+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00114,"percentile":0.01494,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"wpscan.com","source_url":"https://wpscan.com/vulnerability/3d43ae6a-ca0d-49f9-aa3a-a584e5155efe/","investigate_url":"https://investigate.aeglixmind.com/#wpscan.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-103311","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-103311","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-103311","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}