The Catholic Catechism itself (see the quote below), Catholic Exorcists, and the Vatican’s Doctrinal Commission (see their ICCR website) have all stated that the occult can be used to invite demons to actually curse peolple.
The Catholic Catechism of the Roman Catholic Church, of which Saint Pope John Paul said : ‘I put my Apostolic Authority (as Pope) on this work.’
States:
Divination and magic
2116 All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to “unveil” the future.48 Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone.
2117 All practices of magic or sorcery, by which one attempts to tame occult powers, so as to place them at one’s service and have a supernatural power over others - even if this were for the sake of restoring their health - are gravely contrary to the virtue of religion. These practices are even more to be condemned when accompanied by the intention of harming someone, or when they have recourse to the intervention of demons. Wearing charms is also reprehensible. Spiritism often implies divination or magical practices; the Church for her part warns the faithful against it.
Furthermore: the Roman Catholic Church states that use of the occult/ divination/ magic: is grave matter that is a mortal sin if done deliberately, with full knowledge and full freedom.
Further to this: Catholic Exorcists have stated the most common root cause for someone needing Exorcism is that they were gravely involved in the occult