{"cve":"CVE-2026-17553","nvd":{"published":"2026-09-09T04:17:56.607","modified":"2026-09-09T15:33:34.467","status":"Deferred","description":"The WP EasyCart plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 5.9.3. This is due to the ec_ajax_save_page_default_options() AJAX handler iterating over every $_POST key and passing it directly into update_option() without any allowlist, while gating the handler only on 'manage_options' OR the plugin's custom 'wpec_manager' capability. The plugin's built-in 'wpec_store_manager' role holds 'wpec_manager' but not 'manage_options', and the required nonce is emitted on frontend product/category templates that render for any user with 'wpec_manager'. This makes it possible for authenticated attackers, with Store Manager-level access and above, to elevate their privileges to administrator by updating arbitrary WordPress options such as default_role='administrator' and users_can_register='1', then self-registering a new account that is assigned the administrator role.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2},"cwes":["CWE-269"],"references":["https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/admin/inc/wp_easycart_admin.php#L209","https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/design/layout/base-responsive-v3/ec_product_page.php#L415","https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7103","https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7107","https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7110"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:53.108888569+00:00"},"epss":{"cve":"CVE-2026-17553","score":0.00639,"percentile":0.50621,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}