SKT Addons for Elementor < 1.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Countdown Block

Description

The SKT Addons for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Countdown Block in versions up to, and including, 1.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.