A new version of the Shockwave player is available from Adobe. The official download page correctly shows the new version as 12.2.3.183, and that’s what you’ll get if you install Shockwave Player from there.

Unfortunately, Adobe still lags behind in updating other web resources related to Shockwave. The Shockwave Player help page, which detects the version you’re running, correctly identifies the installed version, but claims that the newest version is 12.1.9.159. The release notes page for Shockwave 12.x lists the latest version as 12.2.1.171.

If you use a web browser with Shockwave enabled, you should install version 12.2.3.183 as soon as possible, because there are almost certainly security fixes in the new version.