If you are using Joomla GMapFP, it is better to check your system if any vulnerability exists.
There is a vulnerability in Joomla Component GMapFP with Version J3.5 and J3.5free that allows attackers to upload files without authentication. Problem occurs due to unrestriction about file uploading. Attacker changes the content-type and name file to bypass this unrestriction.
If you have this vulnerability, update your Joomla GMapFP to higher versions.