Voatz, a mobile voting app that's already been used in several elections in the United States, has more than a dozen critical security flaws, according to a newly released audit. The audit also shows Voatz publicly refuted an MIT report that found flaws in its app even after it received confirmation that it was accurate.

The audit, which was prepared by cybersecurity firm Trail of Bits for Voatz and Tusk Philanthropies, which has partnered with Voatz on some of its pilot voting projects, found 48 technical vulnerabilities, 16 of which were "high-severity issues."