CVE-2026-18391

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "WooCommerce Subscriptions", "vendor": "Unknown", "versions": [{"lessThan": "9.1.0", "status": "affected", "version": "4.7.0", "versionType": "semver"}]}], "source": "contact@wpscan.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The WooCommerce Subscriptions WordPress plugin before 9.1.0 does not validate user input before unserializing it on stores with High-Performance Order Storage enabled, leading to a PHP Object Injection issue which unauthenticated users can escalate to Remote Code Execution via a gadget chain present in the bundled dependencies."}], "id": "CVE-2026-18391", "lastModified": "2026-08-26T16:30:52.723", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18391", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-12T19:39:49.283713Z", "version": "2.0.3"}}]}, "published": "2026-08-12T06:20:14.167", "references": [{"source": "contact@wpscan.com", "url": "https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/"}], "sourceIdentifier": "contact@wpscan.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.7.0,9.1.0)"}}], "enrichment": {"confidence": 85.0, "confidence_source": "inferred", "scores": [{"score": 85.0, "source": "inferred"}, {"score": 86.0, "source": "matching"}]}, "original": {"product": "WooCommerce Subscriptions", "source": "cna", "vendor": "Unknown"}, "product": "subscriptions", "vendor": "woocommerce"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "wordpress", "vendor": "wordpress"}], "created": "2026-08-12T12:45:02.904872+00:00", "updated": "2026-08-13T10:30:04.647978+00:00", "vendors": ["woocommerce", "woocommerce$PRODUCT$subscriptions", "wordpress", "wordpress$PRODUCT$wordpress"], "weaknesses": ["CWE-434", "CWE-502"]}