Found the error Not allowed to load local resource: file:///etc/passwd while looking at infosec.pub’s communities page. There’s a community called “ignore me” that adds a few image tags trying to steal your passwd file.
You have to be extremely poorly configured for this to work, but the red flags you see should keep you on your toes for the red flags you don’t.
If you find something, report it. Don’t experiment on the public.
https://www.bugcrowd.com/resources/guide/what-is-responsible-disclosure/
That harmless self retweeting tweet was pretty funny though
My first thought was that a Javascript library pulled from a CDN got spiked.