Input validation vulnerability in Multilanguage by BestWebSoft – WordPress Translation Plugin and Language Switcher 1.2.3

The Multilanguage by BestWebSoft plugin for WordPress is vulnerable to a security issue called Reflected Cross-Site Scripting. This issue can be exploited by unauthenticated attackers to inject malicious web scripts into pages that are displayed to users if they can somehow trick them into performing an action such as clicking a link. This vulnerability exists in versions of the plugin before 1.2.3 due to the way it handles input data and prevents scripts from being executed.