{"id":"CVE-2025-3889","aliases":["EUVD-2025-15023","GHSA-cp88-7fch-35v3"],"status":"published","title":"WordPress Simple PayPal Shopping Cart \u003c= 5.1.3 - Insecure Direct Object Reference via 'quantity'","description":"The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.","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":"2026-11-09","score":0.00366,"percentile":0.30635,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2025-05-01T11:11:41Z","modified":"2026-06-17T09:20:52Z","products":[{"vendor":"mra13","product":"simple shopping cart"},{"vendor":"tipsandtricks-hq","product":"wordpress_simple_paypal_shopping_cart"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/41212533-535e-4a9e-a9b8-1240021a3752?source=cve","tags":["Third Party Advisory"]},{"url":"https://plugins.trac.wordpress.org/browser/wordpress-simple-paypal-shopping-cart/tags/5.1.2/wp_shopping_cart.php#L324","tags":["Product"]},{"url":"https://www.tipsandtricks-hq.com/ecommerce/wp-shopping-cart","tags":["Product"]},{"url":"https://www.tipsandtricks-hq.com/ecommerce/simple-shopping-cart-enabling-manual-offline-checkout","tags":["Product"]},{"url":"https://plugins.trac.wordpress.org/changeset/3284572/","tags":["Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-3889"},{"url":"https://plugins.trac.wordpress.org/changeset/3284572"},{"url":"https://github.com/advisories/GHSA-cp88-7fch-35v3"}],"sources":{"cve":[{"id":"CVE-2025-3889","title":"WordPress Simple PayPal Shopping Cart \u003c= 5.1.3 - Insecure Direct Object Reference via 'quantity'","description":"The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.","status":"published","published":"2025-05-01T11:11:41.53Z","modified":"2026-04-08T16:48:35.209Z","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"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:32:39.719629Z"}],"euvd":[{"id":"EUVD-2025-15023","description":"The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.","status":"published","published":"2025-05-01T11:11:41Z","modified":"2026-04-08T16:48:35Z","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":"2026-11-02T19:25:01.349884Z"}],"ghsa":[{"id":"GHSA-cp88-7fch-35v3","title":"The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object...","description":"The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.","status":"published","published":"2025-05-01T12:31:16Z","modified":"2025-05-01T12:31:33Z","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"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:02:05.229867Z"}],"nvd":[{"id":"CVE-2025-3889","description":"The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.","status":"published","published":"2025-05-01T12:15:17.63Z","modified":"2026-06-17T09:20:52.15Z","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"},{"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":"primary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:11:02.570368Z"}]}}