Sadly, this is something very true and was all over the news some time ago. And the Vatican even admitted it was a serious problem/issue. Here are some links:
natcath.org/roberts.htm
natcath.com/NCR_Online/archives/031601/031601a.htm
nytimes.com/2001/03/21/world/21NUNS.html?ex=1212033600&en=b056127ee3a099af&ei=5070
news.bbc.co.uk/2/hi/europe/1232818.stm
ted.examiner.ie/archives/2001/march/31/current/ipage_9.htm
natcath.com/NCR_Online/archives/040601/040601d.htm
timesonline.co.uk/tol/news/world/europe/article718328.ece
christianaggression.org/item_display.php?type=NEWS&id=1128225631
cta-usa.org/watch04-01/abuseofnuns.html
europarl.europa.eu/pv2/pv2?PRG=CALDOC&TPV=DEF&FILE=010405&TXTLST=1&POS=1&LASTCHAP=1&SDOCTA=19&Type_Doc=FIRST&LANGUE=EN
"B. extremely concerned about the substance of a report which appeared in the American periodical the National Catholic Reporter, according to which a large number of Catholic nuns have been raped by priests in at least 23 countries,
C. whereas the Holy See has confirmed that it was aware of cases of rape and sexual abuse of women, including nuns, by Catholic priests, notably because, since 1994, at least five reports on this subject have been submitted to the Vatican,
D. whereas, although the officials responsible were well informed about these human rights violations, they did not take any proper action in response,
E. whereas according to these reports several of the nuns who had been raped were also compelled to have abortions or to resign, or in some cases were contaminated with HIV/AIDS,
F. whereas according to the spokesman for the Vatican, Joaquín Navarro Valls, the Vatican is aware of the problem but it is geographically limited and whereas, on the contrary, this phenomenon is not confined to Africa,
G. whereas sexual abuse is a crime against the human person and whereas those who have committed these crimes must be brought to justice,
- Condemns all violations of women’s rights and acts of sexual violence, particularly against Catholic nuns; expresses its solidarity with the victims;
- Calls for those responsible for these crimes to be arrested and brought to justice; calls on the judicial authorities of the 23 countries cited in the reports to ensure that all appropriate judicial action is taken to establish the truth about these cases of violence against women;
- Calls on the Holy See to take all allegations of sexual abuse within its organisations seriously, to cooperate with the judicial authorities and to remove the perpetrators from office;
- Calls on the Holy See to reinstate those female officials who have been removed from their posts for drawing their supervisors" attention to these abuses and afford the victims the necessary protection from and compensation for any discrimination which might ensue;"
Like the abuse situation in the USA, the Vatican has been slow to respond to this problem as well.