If you are on version 17.0.0.169 of Adobe Flash Player, you have to update to the latest available version released today by the developers, version 17.0.0.188. Almost a month ago the plugin was updated with improvements in use, stability and security, this new version does not seem to add many significant changes compared to the previous version. The improvements also focus on the performance of 3D content and games, add improvements in video compatibility and performance and finally we have new APIs to improve the user browsing experience on the most current devices.
These updates usually appear automatically on our Mac through a pop-up window that warns of the available version, but you can always access from System preferences and click on the flash icon, then go to the top tab Advanced and in it you will see the updates section in which the version you have installed on your machine appears. You can also enter the website of Adobe Flash Player and see if we have the latest version available installed.
The important thing in these cases is to be updated to the latest version available for protect our Mac from possible third-party threats. Remember that to install these new updates for Adobe Flash Player, it is necessary to close the browsers of our Mac.