The speculation was already mentioned in the article, which is why I mentioned it in the comment.
The article also mentioned Iran is intending to launch its own astronauts into space. But it seems like that is going to require a much bigger rocket. The U.S. single-seat Mercury capsules weighed about 3,000 pounds. An ICBM (Atlas missile) was necessary to get that into orbit. An IRBM (Redstone missile) was used for the first sub-orbital flights.
Considering that Iran has been launching ballistic missiles in actual warfare this year, it is an issue worth some discussion. The "international community" has been trying to prevent Iran from making both ICBMs and nuclear weapons for decades. The same was tried with North Korea, which, as already reported, has now developed both. And North Korea has been more effectively isolated and for a longer period than Iran.