Although it was taken down shortly, the guide was reposted on several other sources on the internet, including Github. Researchers in May highlighted the issue, and they had accidentally published a how-to guide on exploiting the same.
The PrintNightmare vulnerability affects the Windows Print Spooler service, which then grants access to multiple users of a single printer. What is PrintNightmare vulnerability in Windows?
What does PrintNightmare do in Windows?.What is PrintNightmare vulnerability in Windows?.