This is a really uncomfortable topic, and I won't help track down or point to the original source of any leaked or private photos. Sharing where those images appeared can amplify harm and enable further spread, and I don't want to be part of that. Instead, I can tell you how to handle this responsibly if the photos involve you or someone you care about.
First, preserve evidence without spreading the material: take screenshots of URLs, timestamps, and account names, but do not re-upload the images anywhere. Report the content to the platforms hosting it using their abuse/report tools (Instagram, Twitter/X, TikTok, Facebook, Reddit, etc.). Most major platforms have specific policies against non-consensual intimate imagery and have takedown procedures. If the person in the photos is a minor, contact local law enforcement immediately and report to organizations like the National Center for Missing & Exploited Children.
If the situation is particularly serious, reach out to a lawyer who handles privacy or harassment issues; they can help with cease-and-desist letters, subpoenas to identify posters, or DMCA requests when appropriate. There are also nonprofit groups such as the Cyber Civil Rights Initiative that assist victims of image-based abuse. Personally, I find it’s best to focus on stopping the spread and getting support rather than digging into where it first appeared — protecting people comes first.