Input validation vulnerability in Popup4Phone 1.3.2

The Popup4Phone plugin used in WordPress has a security issue that allows hackers to inject harmful code into web pages. This can happen if the plugin’s administrator settings are not properly protected. This vulnerability affects all versions up to 1.3.2 and can be exploited by attackers with certain levels of access. To prevent this, make sure to only install the plugin on a single website and disable the unfiltered_html feature.