Apparently a new version of Adobe Shockwave was released on July 1, 2014. The new version is 12.1.3.153.

The main welcome/download page for Shockwave shows the latest version and provides a test that shows the version you’re currently running. If you’re not running the latest version, you can download and install it from that page. The Shockwave Player Help page does much the same thing.

Adobe’s web resources for Shockwave are appallingly bad. The list of security updates is over a year out of date. The most recent update listed is for version 12.1.0.150. The official Shockwave version history is even worse, as it hasn’t been updated since 2007! There doesn’t seem to be any kind of an update alert mechanism such as an RSS feed, although with the information so out of date, that wouldn’t really help.

The best resource for keeping track of Shockwave versions that I’ve found so far is FileHippo’s Shockwave version history.