User blog comment:Rappy 4187/Technical Update: January 28, 2014/@comment-1277243-20140130071755/@comment--20140131150850

Wikia is currently on version 1.19.10, a security release for version 1.19. As such, we have in fact done the security patch 10 times for our current version, including the one just released. If an issue does not affect 1.19 to the point that 1.19 needs a patch, then we do not worry about (i.e. something introduced in a later version).