{"id":"CVE-2026-18391","state":"PUBLISHED","title":"WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection","description":"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.","publishedAt":"2026-08-12T06:00:17.487Z","updatedAt":"2026-08-12T19:40:07.711Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"WPScan","products":["Unknown WooCommerce Subscriptions"],"affected":[{"vendor":"Unknown","product":"WooCommerce Subscriptions","defaultStatus":"unaffected","versions":[{"version":"4.7.0","status":"affected","lessThan":"9.1.0","versionType":"semver"}]}],"references":["https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/"],"weaknesses":["CWE-434"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18391.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18391","state":"PUBLISHED","datePublished":"2026-08-12T06:00:17.487Z","dateUpdated":"2026-08-12T19:40:07.711Z","assignerShortName":"WPScan","assignerOrgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateReserved":"2026-07-30T14:11:55.443Z"},"containers":{"cna":{"title":"WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection","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."}],"affected":[{"vendor":"Unknown","product":"WooCommerce Subscriptions","defaultStatus":"unaffected","versions":[{"version":"4.7.0","status":"affected","lessThan":"9.1.0","versionType":"semver"}]}],"references":[{"url":"https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/","tags":["exploit","vdb-entry","technical-description"]}],"problemTypes":[{"descriptions":[{"description":"CWE-94 Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"WPScan","orgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateUpdated":"2026-08-12T06:00:17.487Z"},"credits":[{"lang":"en","value":"Vasily Belolapotkov","type":"finder"},{"lang":"en","value":"Vlad Olaru","type":"finder"},{"lang":"en","value":"WPScan","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"WPScan CVE Generator"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-12T19:39:49.283713Z","id":"CVE-2026-18391","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-434","type":"CWE","lang":"en","description":"CWE-434 Unrestricted Upload of File with Dangerous Type"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-12T19:40:07.711Z"}}]}}}