This is an excerpt from the New Advent website;
Pay careful attention to the last paragraph. I recommend you follow the link to learn more.
Instruction on Certain Aspects of “Theology of Liberation”
Sacred Congregation for the Doctrine of the Faith
August 6, 1984
The Gospel of Jesus Christ is a message of freedom and a force for liberation. In recent years, this essential truth has become the object of reflection for theologians, with a new kind of attention which is itself full of promise.
Liberation is first and foremost liberation from the radical slavery of sin. Its end and its goal is the freedom of the children of God, which is the gift of grace. As a logical consequence, it calls for freedom from many different kinds of slavery in the cultural, economic, social, and political spheres, all of which derive ultimately from sin, and so often prevent people from living in a manner befitting their dignity. To discern clearly what is fundamental to this issue and what is a by-product of it, is an indispensable condition for any theological reflection on liberation.
Faced with the urgency of certain problems, some are tempted to emphasize, unilaterally, the liberation from servitude of an earthly and temporal kind. They do so in such a way that they seem to put liberation from sin in second place, and so fail to give it the primary importance it is due. Thus, their very presentation of the problems is confused and ambiguous. Others, in an effort to learn more precisely what are the causes of the slavery which they want to end, make use of different concepts without sufficient critical caution. It is difficult, and perhaps impossible, to purify these borrowed concepts of an ideological inspiration which is compatible with Christian faith and the ethical requirements which flow from it.
The present Instruction has a much more limited and precise purpose: to draw the attention of pastors, theologians, and all the faithful to the deviations, and risks of deviation, damaging to the faith and to Christian living, that are brought about by certain forms of liberation theology which use, in an insufficiently critical manner, concepts borrowed from various currents of Marxist thought.