{"id":"CVE-2026-16621","aliases":["EUVD-2026-57173","GHSA-g8f7-gp6h-9f2x"],"status":"published","title":"Payment Gateway for PayPal on WooCommerce \u003c 9.2.1 - Unauthenticated Payment Bypass via PayPal Advanced Return Handler","description":"The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that payment actually succeeded before completing an order in its PayPal return handler: it reads attacker-controlled parameters, performs no amount comparison and no order-ownership check, and completes the order even when the server-side gateway verification fails, allowing an unauthenticated attacker to mark arbitrary orders as paid without paying.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00163,"percentile":0.05529,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2026-08-12T11:23:59Z","modified":"2026-08-26T16:30:52Z","products":[{"vendor":"easy payment","product":"payment gateway for paypal on woocommerce"},{"vendor":"unknown","product":"payment gateway for paypal on woocommerce"}],"references":[{"url":"https://wpscan.com/vulnerability/76c4cff2-1166-45fe-9517-5eda2d24c35d/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16621"},{"url":"https://wpscan.com/vulnerability/76c4cff2-1166-45fe-9517-5eda2d24c35d"},{"url":"https://github.com/advisories/GHSA-g8f7-gp6h-9f2x"}],"sources":{"cve":[{"id":"CVE-2026-16621","title":"Payment Gateway for PayPal on WooCommerce \u003c 9.2.1 - Unauthenticated Payment Bypass via PayPal Advanced Return Handler","description":"The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that payment actually succeeded before completing an order in its PayPal return handler: it reads attacker-controlled parameters, performs no amount comparison and no order-ownership check, and completes the order even when the server-side gateway verification fails, allowing an unauthenticated attacker to mark arbitrary orders as paid without paying.","status":"published","published":"2026-08-12T11:23:59.378Z","modified":"2026-08-12T12:14:24.803Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-57173","description":"The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that payment actually succeeded before completing an order in its PayPal return handler: it reads attacker-controlled parameters, performs no amount comparison and no order-ownership check, and completes the order even when the server-side gateway verification fails, allowing an unauthenticated attacker to mark arbitrary orders as paid without paying.","status":"published","published":"2026-08-12T11:23:59Z","modified":"2026-08-12T12:14:24Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:01:59.11112Z"}],"ghsa":[{"id":"GHSA-g8f7-gp6h-9f2x","title":"The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that...","description":"The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that payment actually succeeded before completing an order in its PayPal return handler: it reads attacker-controlled parameters, performs no amount comparison and no order-ownership check, and completes the order even when the server-side gateway verification fails, allowing an unauthenticated attacker to mark arbitrary orders as paid without paying.","status":"published","published":"2026-08-12T12:32:54Z","modified":"2026-08-12T12:33:05Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:10:22.198935Z"}],"nvd":[{"id":"CVE-2026-16621","description":"The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that payment actually succeeded before completing an order in its PayPal return handler: it reads attacker-controlled parameters, performs no amount comparison and no order-ownership check, and completes the order even when the server-side gateway verification fails, allowing an unauthenticated attacker to mark arbitrary orders as paid without paying.","status":"published","published":"2026-08-12T12:17:46.92Z","modified":"2026-08-26T16:30:52.723Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}