Invicti identified you are using an out-of-date version of PHP.
- Sven Morgenroth Talks About PHP Object Injection Vulnerabilities on Paul’s Security Weekly Podcast
- End of Support for PHP 5 and PHP 7.0
- The Powerful Resource of PHP Stream Wrappers
- Sven Morgenroth Talks About PHP Type Juggling on Paul’s Security Weekly Podcast
- Detailed Explanation of PHP Type Juggling Vulnerabilities