An issue was discovered in the Harmis JE Messenger component 1.2.2 for Joomla!. Input does not get validated and queries are not written in a way to prevent SQL injection. Therefore arbitrary SQL-Statements can be executed in the database.
An issue was discovered in the Harmis JE Messenger component 1.2.2 for Joomla!. It is possible to craft messages in a way that JavaScript gets executed on the side of the receiving user when the message is opened, aka XSS.
An issue was discovered in the Harmis JE Messenger component 1.2.2 for Joomla!. It is possible to perform an action within the context of the account of another user.
An issue was discovered in the Harmis JE Messenger component 1.2.2 for Joomla!. It is possible to read information that should only be accessible by a different user.