What is the name of a vulnerability that causes automatic opening of received URLs?

I found a bug in a program that led to the automatic opening of URLs received from other program users.

However, writing a report about it, I realized that I did not know the name of the vulnerability.

I am not an expert in cybersecurity. I have therefore tried to search for it. Some of the research results I got from CWE and OWASP were close, but did not quite fit that.

What could it be?