The WordPress Popup WordPress plugin through 1.9.3.8 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks when the unfiltered_html capability is disallowed (for example in multisite setup)
Zafiyet ile ilgili Genel Bilgi, Etki ve Çözümleri için Devamını Oku
Kaynak: National Vulnerability Database