Host Header Injection in Spiceworks 7.5.7.0 allowing the attacker to render arbitrary links that point to a malicious website with poisoned Host header webpages.
https://frontend.spiceworks.com/topic/2309457-desktop-host-header-injection-vulnerability
http://packetstormsecurity.com/files/160631/Spiceworks-7.5-HTTP-Header-Injection.html