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Several public exploits exist for PHP 5.6.40, including:
Using PHP 5.6.40 in production today means any authenticated user or external attacker could potentially: php version 5640 vulnerabilities verified
Even at the time of 5.6.40’s release, several known vulnerabilities remained unpatched or were backported incompletely. Several public exploits exist for PHP 5
Welcome, Maintainer. You are running PHP 5.6.40. This is the final boss of the PHP 5 era. It is the last stable release before the great migration to PHP 7. Using PHP 5
If you are reading this, you are likely maintaining a legacy application that cannot be upgraded easily. While 5.6.40 is the most secure version of the PHP 5 branch, it is a castle built on a foundation that is no longer inspected by the kingdom's engineers (the PHP Group).
This guide covers the verified architectural vulnerabilities inherent to the PHP 5.x series and how to defend your fortress.
