I have written an article on how to use the SPIKE fuzzer to find vulnerabilities in Vulnserver, which you can read at the InfoSec Institute site.
Links are below.
Part 1: Introduction to Fuzzing
Part 2: Fuzzer Automation with SPIKE
You can download some of the scripts used in the article below:
Exploiting a 64-bit browser with Flash CVE-2015-5119
14 hours ago