/usr/share/fusionforge/ is in fusionforge-plugin-message 6.0.3+20151023-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/fusionforge/cronjobs/
/usr/share/fusionforge/plugins/
/usr/share/fusionforge/plugins/message/
/usr/share/fusionforge/plugins/message/common/
/usr/share/fusionforge/plugins/message/common/messagePlugin.class.php
/usr/share/fusionforge/plugins/message/db/
/usr/share/fusionforge/plugins/message/db/message-init.sql
/usr/share/fusionforge/plugins/message/etc/
/usr/share/fusionforge/plugins/message/etc/message.ini
/usr/share/fusionforge/plugins/message/www/
/usr/share/fusionforge/plugins/message/www/index.php
/usr/share/fusionforge/plugins/message/www/js/
/usr/share/fusionforge/plugins/message/www/js/message.js
/usr/share/fusionforge/post-install.d/