The App Landing Template Blocks for WPBakery (Visual Composer) Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'atvc_video_play' shortcode in all versions up to, and including, 2.0.2 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
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