Version 18.104.22.168 and earlier of the Flash plugin are vulnerable and an active exploit exists for them in the wild: https://helpx.adobe.com/security/products/flash-player/apsb17-32.html
The block is now staged. Bogdan, can you please test and then ping :TheOne to have it deployed? (I'll be traveling tomorrow)
Since this only affects ESR and Flash blocks are simpler now, let's skip the QA step. Sorry for the noise. Andreas, please push this block live.
The block is now live.