itch.io

There is no "before" the vulnerability. It is present in basically ALL Unity games and applications published since 2017, but was only discovered this year.
https://unity.com/security/sept-2025-01

It is not just CB, the security vulnerability is present in basically all Unity games and applications published in the last 8 years. No know malware uses it but better safe than sorry. 
https://unity.com/security/sept-2025-01
Unity software either needs to be rebuilt from source with patched versions of the editor or already built applications can be patched by a special patching tool Unity has released.
https://unity.com/security/sept-2025-01/remediation

No worries, was mostly just making sure there was supposed to be a game over there, so I would be sure not to save after.

Ah okay, I'll just avoid it then, thanks for letting me know.

I think I found a bug in the room with the purple dust. If the monster catches me the screen goes black and some text is displayed about it being too big, but with no CG. Once the text finishes the game room reappears with Kana naked in the area where the monster was trapped. The monster itself is frozen and can't be interacted with, and leaving the room does not help. I am using the most recent version of the game and here is a copy of the relevant save.

Edit: Re-downloaded the game and started a new game, same issue.