The remote host is vulnerable to multiple attack vectors.
The remote host is running FlySpray, a bug-reporting web application. This version of Flyspray is vulnerable to a remote cross-site scripting (XSS) attack. An attacker exploiting this flaw would typically need to convince a user to browse to a malicious URI. Success exploitation would result in the theft of confidential materials (such as authentication cookies). In addition, the remote host is vulnerable to a remote file inclusion flaw. A remote attacker can supply PHP code and then trick the FlySpray server into executing the code.
Upgrade or patch according to vendor recommendations.