CVE-2026-15441: Product Table & List Builder For WooCommerce <= 5.6.0 - Unauthenticated CSS Injection via 'laptop_scroll_offset' Parameter

The WC Product Table Lite plugin for WordPress is vulnerable to CSS Injection in versions up to, and including, 5.6.0 via the 'laptopscrolloffset' shortcode attribute exposed through the unauthenticated wcptajax() AJAX handler. The handler is registered for wpajaxnoprivwcptajax, JSON-decodes attacker-supplied attributes, only allowlists key names (not values), applies a pregreplace that strips only [ ] < >, and passes the value through doshortcode into wcptstylestickysidebar(), where it is interpolated verbatim into inline CSS ('top: {$top}px;' and 'max-height: calc(100vh - {$top}px);') with no numeric casting or CSS escaping. This makes it possible for unauthenticated attackers to inject arbitrary CSS declarations and rules on pages rendering a product table with sticky sidebar enabled, which can be leveraged for data exfiltration (via attribute-selector + background-image URLs), UI redressing, and phishing that bypasses CSPs permitting inline styles.