The remote host is using a version of Zend Framework that is vulnerable to SQL Injection (SQLi).
Versions of Zend Framework prior to 1.12.9, 2.2.x earlier than 2.2.8, or 2.3.x earlier than 2.3.3 are vulnerable to a flaw that may allow an SQL injection attack. The issue is due to improper use of the SQLSRV PHP extension, as user-supplied input containing NULL bytes is not properly sanitized. This may allow a remote attacker to inject or manipulate SQL queries in the back-end database, allowing for the manipulation or disclosure of arbitrary data.
Upgrade Zend Framework to version 2.3.3 or later. If version 2.3.x is not available, versions 2.2.8 and 1.12.9 are also patched for this vulnerability.