The default configuration of phpThumb before 1.7.12 has a false value for the disable_debug option, which allows remote attackers to conduct Server-Side Request Forgery (SSRF) attacks via the src parameter.
- http://www.rafayhackingarticles.net/2013/11/phpthumb-server-side-request-forgery.html
- https://github.com/connar/vulnerable_phpThumb