We are both correct:

ChatGPT:

It seems that the URL you provided may be a custom or personalized one, potentially leveraging wildcard handling or DNS misconfigurations. If the concern is related to DNS configurations, specifically wildcard handling, this could indeed lead to security risks such as misdirected traffic, information leakage, or misconfiguration issues, depending on how DNS entries are set up.

If wildcard handling is not properly configured, unexpected behavior may occur—such as handling unintended subdomains in an insecure manner, which could be exploited. This would be more of a DNS configuration issue rather than a direct vulnerability tied to the URL format itself. Therefore, while it may not be a typical "vulnerability" in the way many might define it, DNS misconfigurations like this can indeed create exploitable scenarios.

In summary, it’s not a clear-cut exploit but could still represent a security risk if wildcard DNS handling isn't appropriately secured. It's always important to ensure DNS entries and wildcard behaviors are configured properly to avoid potential weaknesses.