{"id":"CVE-2026-18391","aliases":["EUVD-2026-57100","GHSA-5736-34m2-3cxc"],"status":"published","title":"WooCommerce Subscriptions \u003c 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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00963,"percentile":0.6209,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2026-08-12T06:00:17Z","modified":"2026-08-26T16:30:52Z","products":[{"vendor":"unknown","product":"woocommerce subscriptions"},{"vendor":"woo","product":"woocommerce subscriptions"}],"references":[{"url":"https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18391"},{"url":"https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27"},{"url":"https://github.com/advisories/GHSA-5736-34m2-3cxc"}],"sources":{"cve":[{"id":"CVE-2026-18391","title":"WooCommerce Subscriptions \u003c 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.","status":"published","published":"2026-08-12T06:00:17.487Z","modified":"2026-08-12T19:40:07.711Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:20:12.260247Z"}],"euvd":[{"id":"EUVD-2026-57100","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.","status":"published","published":"2026-08-12T06:00:17Z","modified":"2026-08-12T19:40:07Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:01:57.602969Z"}],"ghsa":[{"id":"GHSA-5736-34m2-3cxc","title":"The WooCommerce Subscriptions WordPress plugin before 9.1.0 does not validate user input before...","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.","status":"published","published":"2026-08-12T06:30:50Z","modified":"2026-08-12T21:31:35Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T15:10:23.958572Z"}],"nvd":[{"id":"CVE-2026-18391","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.","status":"published","published":"2026-08-12T06:20:14.167Z","modified":"2026-08-26T16:30:52.723Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}