Totally safe [in Iran]. Unless you're a dissident. Or an environmentalist. Or a journalist. Or a labour unionist. Or a dual citizen. Or an NGO worker. Or an academic. Or an AIDS researcher. Or a software developer. Or a Baha'i. Or a woman. But otherwise, you know, totally safe.

source here. 

In response to the former Islamist fascists' ambassador to Germany at the time of Mykonos murders of Iranian dissidents by the murders dispatched from Iran and logistical support form their embassy in Germany:

Travel Risk Map 2019: Iran as safe as the UK and Slovenia, Denmark and Switzerland among world's least dangerous countries