The test connection functionality in the NetAudit section of Opsview Monitor before 5.3.1 and 5.4.x before 5.4.2 is vulnerable to command injection due to improper sanitization of the rancid_password parameter.
The /etc/init.d/opsview-reporting-module script that runs at boot time in Opsview Monitor before 5.3.1 and 5.4.x before 5.4.2 invokes a file that can be edited by the nagios user, and would allow attackers to elevate their privileges to root after a system restart, hence obtaining full control of the appliance.
In Opsview Monitor Pro (Prior to 5.1.0.162300841, prior to 5.0.2.27475, prior to 4.6.4.162391051, and 4.5.x without a certain 2016 security patch), an unauthenticated Directory Traversal vulnerability can be exploited by issuing a specially crafted HTTP GET request utilizing a simple URL encoding bypass, %252f instead of /.
Open redirect vulnerability in Opsview Monitor Pro (Prior to 5.1.0.162300841, prior to 5.0.2.27475, prior to 4.6.4.162391051, and 4.5.x without a certain 2016 security patch) allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via the back parameter to the /login URI.