Magento Community Edition 2.0.3 has been released, this release includes several significant security enhancements as well as performance improvements and functional enhancements.

Highlights:

• Prevents anonymous access to web APIs by default
• Sets limits on the number of Admin and Customer Token Access API password attempts allowed
• Fully resolves a previous issue with cross-site scripting
• Fixes multiple parameters in the Authorize.net payment module

Resources:
– Magento CE Downloads
– Magento 2x Upgrade Guide
– Magento CE 2.0.3 Change-log