yarnd that's been around for awhile and is still present in the current version I'm running that lets a person hit a constructed URL like
@prologic@twtxt.net I believe you are not seeing the problem I am describing.
Hit this URL in your web browser:
https://twtxt.net/external?nick=lovetocode999&uri=https://socialmphl.com/story19510368/doujin
That’s your pod. I assume you don’t have a user named lovetocode999 on your pod. Yet that URL returns HTTP status 200, and generates HTML, complete with a link to https://socialmphl.com/story19510368/doujin, which is not a twtxt feed (that’s where the twtxt.txt link goes if you click it). That link could be to anything, including porn, criminal stuff, etc, and it will appear to be coming from your twtxt.net domain.
What I am saying is that this is a bug. If there is no user lovetocode999 on the pod, hitting this URL should not return HTTP 200 status, and it should definitely not be generating valid HTML with links in it.
Edit: Oops, I misunderstood the purpose of this /external endpoint. Still, since the uri is not a yarn pod, let alone one with a user named lovetocode999 on it, I stand by the belief that URLs like this should be be generating valid HTML with links to unknown sites. Shouldn’t it be possible to construct a valid target URL from the nick and uri instead of using the pod’s /external endpoint?