The Popup Maker WordPress plugin before 1.16.11 does not sanitise and escape some of its Popup options, which could allow users with a role as low as Contributor to perform Stored Cross-Site Scripting attacks, which could be used against admins
The Popup Maker WordPress plugin before 1.16.5 does not sanitise and escape some of its Popup settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed
An issue was discovered in the Popup Maker plugin before 1.8.13 for WordPress. An unauthenticated attacker can partially control the arguments of the do_action function to invoke certain popmake_ or pum_ methods, as demonstrated by controlling content and delivery of popmake-system-info.txt (aka the "support debug text file").
Cross-site scripting vulnerability in Popup Maker prior to version 1.6.5 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.