Currently it seems to be a vulnerability with custom emojis only, which this instance never had, so currently we shouldn't be affected. However this is a developing situation and we will continue to monitor.
My EEEEEEEEEEYES AUUUUUUUUUUUUUUUUUUGH the instance is pure white, probably utilizing some witch-craft to bring sunlight directly into my eyes. How do I return the blessed darkness to my screen??
It's been interesting watching this all play out on an open source social network. It's all out in the open so it caused quite the drama, but the actual order of events? Site goes down and is back up and vulnerability patched like 4 hours later? That's really impressive.