The NewStatPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'QUERYSTRING / REQUESTURI' parameter in all versions up to, and including, 1.4.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that an administrator has placed the [NewStatPress type="Top Pages"] shortcode on a publicly viewable page, and that the attacker's crafted URL accumulates enough hits to appear in the top-N ranking.

The NewStatPress WordPress plugin before 1.4.5 does not sanitise and escape data derived from unauthenticated visitor requests before storing it and later outputting it in one of its widgets, which could allow unauthenticated attackers to perform Stored Cross-Site Scripting attacks against users viewing the affected widget.