Afiuni remains under house arrest despite no trial. She is reportedly battling cancer.
"I am only one victim, Judge Afiuni is another. Let's not forget that millions of Venezuelans are targets of a government that does not respect the Universal Declaration of Human Rights," Cedeño told the U.N.
Cedeño's testimony is part of an international campaign to fight Venezuela's bid to join the U.N.'s top human rights body. The General Assembly is expected to vote on Venezuela's membership this fall.
Cedeño told FoxNews.com he will continue to speak out against Chávez's campaign to join the U.N. Human Rights Council.
