The Stock Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'image_height' and 'image_width' shortcode attributes in all versions up to, and including, 1.1. This is 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.