EZ SQL Reports Shortcode Widget and DB Backup <= 5.25.25 - Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header

The EZ SQL Reports Shortcode Widget and DB Backup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'HTTP_USER_AGENT (demonstrated); more generally, any attacker-controllable DB column the saved report selects' parameter in all versions up to, and including, 5.25.25 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. This requires an administrator to have saved a SQL report that selects an attacker-controllable database column, such as wp_comments.comment_agent, which WordPress stores verbatim from unauthenticated visitors even when comments are pending moderation.