The Popup box WordPress plugin before 3.7.2 does not sanitize and escape some Popup fields, which could allow high-privilege users such as an administrator to inject arbitrary web scripts even when the unfiltered_html capability is disallowed (for example in a multisite setup).
El complemento Popup box de WordPress anterior a 3.7.2 no sanitiza ni escapa de algunos campos emergentes, lo que podría permitir a usuarios con altos privilegios, como un administrador, inyectar scripts web arbitrarios incluso cuando la capacidad unfiltered_html no está permitida (por ejemplo, en una configuración multisitio).
The Popup Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 3.7.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
