When Google released Android 4.1 Jelly Bean in 2012, Flash support found itself on the cutting room floor, no longer downloadable in the Google Play Store and dropped from the mobile platform.
Just over 24 hours ago, a major security vulnerability affecting all versions of Flash for Windows, Mac and Linux was discovered and reported to Adobe. Hopefully you've already uninstalled Flash ...
Since Adobe itself has discontinued this product, there are no official fixes to the issue. However, there are some solutions you can implement to unblock Flash Player on Chrome, Edge, Firefox, Opera, ...