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Zend Framework < 2.2.5 Trusted Proxy Bypass



The remote host is using a version of Zend Framework that is vulnerable to a security bypass attack.


Versions of Zend Framework prior to 2.2.5 are vulnerable to a flaw in the 'Zend\Http\PhpEnvironment\RemoteAddress' class. The issue is triggered when PHP's $_SERVER['REMOTE_ADDR'] is not taken into account on the trusted proxy server list when handling an incoming proxied request via the 'X-Forwarded-For' header. This may allow a remote attacker to bypass the trusted proxy list.


Upgrade Zend Framework to version 2.2.5 or later.