Wow, I spent the better part of a graduate course titled "Critical Theory" reading the likes of Benjamin, Adorno, Habermas, and others, who were talked about explicitly under the banner of "Cultural Marxism," and now I come to find from Wikipedia that this is all just a right-wing conspiracy.  Someone really ought to inform the very left-wing, self-identifying Cultural Marxists who occupy professorships all over the Humanities in top research universities all around the U.S.  I can't speak for other countries, but "Cultural Marxism" is a normal term for discussion in American universities.  To call it a "conspiracy" makes Wikipedia into a joke.