The original advisory describes a POP chain involving three magic methods: __destruct (to initiate the chain), __call (to proxy malicious method calls), and __invoke (to execute arbitrary code). The provided PoC demonstrates serialized objects leveraging these methods sequentially. While the advisory was later withdrawn due to being a false positive, the technical analysis of the reported chain explicitly identifies these functions as the exploitation pathway. The high confidence stems from the reproducible exploit code and explicit documentation in the original vulnerability report.