Version 2.5.5 (August 2017)
Version 2.5.4 (May 2017)
Version 2.5.3 - Paypal Security Announcement (March 2017) This version fixed a medium level security issue which happens with PayPal payment plugin. In older version, PayPal payment plugin has a bug which allow dis-honest users with certain level technical skill can pay for the subscription using different currency with the currency you set for your system, thus paying lower price for the subscription.
Version 2.5.2 - Security Announcement (March 2017) Check for the latest Joomla! OS Services Booking version. If you are not on the latest release, read the release notes to see if you need to upgrade. If a release is being made in order to address security issues then it is strongly advised that you upgrade as soon as possible. If you are running an earlier release of the current version (for example, you are running OS Services Booking 2.5.1 or lower), you should upgrade to the current version. This minor release fixes a SQL Injection issue on router function of OS Services Booking (root > components > com_osservicesbooking > router.php)
Version 2.5.1 (January 2017)
Version 2.5.0 (December 2016)