According to the tag RFC 8657, the following results have been found:
A hole in Cloudflare’s shield: how the attack on Jabber.ru exposed a problem no one has talked about since 2023
Many remember the year-before-last incident with the Man-in-the-Middle attack on the XMPP service jabber.ru. This story caused a lot of noise, but I think the main point was never really taken to heart by the wider audience. And that’s a shame. Because this attack exposed a systemic vulnerability in the TLS certificate issuance process, which directly affects millions of sites—especially those who trust their security to Cloudflare.