CVE-2026-17553
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.2
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-269
- Published
- 2026-09-09
- Last modified
- 2026-09-09
Affected products
- levelfourstorefront Shopping Cart & eCommerce Store
Weakness type
Related vulnerabilities
- CVE-2026-86746 — Snipe-IT before 8.7.0 Authorization Bypass via Livewire Snapshot Replay
- CVE-2026-12858 — Local privilege escalation vulnerability in ESET AV Remover
- CVE-2026-14359 — YITH WooCommerce Waitlist Premium <= 3.35.0 - Authenticated (Subscriber+) Privilege Escalation to Admin via wp_ajax_yith_wcwtl_add_user
- CVE-2026-75927 — PublishPress Capabilities <= 2.50.0 - Authenticated (Editor+) Privilege Escalation to Fresh-Install Default Capability Grant
- CVE-2026-76801 — FireBox <= 3.1.10 - Authenticated (Author+) Remote Code Execution to Privilege Escalation
- CVE-2026-84869 — ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
- CVE-2026-66818 — Microsoft SQL Server Elevation of Privilege Vulnerability
- CVE-2026-68830 — Windows Universal Plug and Play (UPnP) Device Host Information Disclosure Vulnerability