CVE-2021-32708 Time-of-check Time-of-use (TOCTOU) Race Condition in league/flysystem

Flysystem is an open source file storage library for PHP. The whitespace normalisation using in 1.x and 2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a malicious user to execute code remotely. The conditions are: A user is allowed to supply the...