This was an error found by @metamania01 of the Audit Company Solshield.

It allowed one to verify a creator that did not sign by making use of a provision in Token Metadata that allows Creators who have signed compressed nfts to allow them to decompress with verified creators.

The issue is now patched.
For more info see.
https://twitter.com/thehasheddude/status/1601642138143375360