The ShopLentor – WooCommerce Builder for Elementor & Gutenberg +12 Modules – All in One Solution (formerly WooLentor) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the slitems parameter in the WL Special Day Offer Widget in all versions up to, and including, 2.8.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor access or above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.