CVE-2021-21708 | PHP up to 7.4.27/8.0.15/8.1.2 FILTER_VALIDATE_FLOAT use after free (Bug 81708 / Nessus ID 233258)
A vulnerability classified as critical was found in PHP up to 7.4.27/8.0.15/8.1.2. Affected by this vulnerability is an unknown functionality of the component FILTER_VALIDATE_FLOAT Handler. The manipulation leads to use after free.
This vulnerability is known as CVE-2021-21708. The attack can be launched remotely. There is no exploit available.
It is recommended to upgrade the affected component.