At first glance, this security incident looks like a non-issue for the most part. It's common that companies' customer forums or support portals are compromised

At first glance, this security incident looks like a non-issue for the most part. It's common that companies' customer forums or support portals are compromised. It seems like a common attack vector. While, I'm relatively certain some very nasty breaches will come with time and the proliferation of vendors, has there already been a catastrophic security incident that happened as a result of using proprietary, closed-source LLMs?