The Iowa Caucuses App Had Another Problem: It Could Have Been Hacked

A glitch in the smartphone app used to count and report votes from individual precincts continues to delay results from Monday’s Iowa caucuses. But a closer look shows that the app had a potentially graver problem that apparently did not come into play: its vulnerability to hacking.

The IowaReporterApp was so insecure that vote totals, passwords and other sensitive information could have been intercepted or even changed, according to officials at Massachusetts-based Veracode, a security firm that reviewed the software at ProPublica’s request. Because of a lack of safeguards, transmissions...